/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:19:39,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:19:39,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:19:39,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:19:39,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:19:39,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:19:39,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:19:39,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:19:39,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:19:39,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:19:39,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:19:39,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:19:39,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:19:39,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:19:39,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:19:39,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:19:39,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:19:39,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:19:39,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:19:39,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:19:39,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:19:39,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:19:39,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:19:39,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:19:39,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:19:39,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:19:39,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:19:39,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:19:39,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:19:39,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:19:39,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:19:39,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:19:39,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:19:39,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:19:39,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:19:39,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:19:39,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:19:39,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:19:39,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:19:39,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:19:39,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:19:39,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:19:39,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:19:39,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:19:39,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:19:39,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:19:39,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:19:39,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:19:39,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:19:39,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:19:39,315 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:19:39,315 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:19:39,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:19:39,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:19:39,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:19:39,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:19:39,583 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:19:39,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-05-02 22:19:39,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2277749/51e24e817e5d4d8fa24ee3e35a8e70da/FLAGa35383f79 [2021-05-02 22:19:40,003 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:19:40,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-05-02 22:19:40,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2277749/51e24e817e5d4d8fa24ee3e35a8e70da/FLAGa35383f79 [2021-05-02 22:19:40,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2277749/51e24e817e5d4d8fa24ee3e35a8e70da [2021-05-02 22:19:40,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:19:40,436 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:19:40,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:19:40,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:19:40,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:19:40,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4063f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40, skipping insertion in model container [2021-05-02 22:19:40,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:19:40,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:19:40,578 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2021-05-02 22:19:40,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:19:40,596 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:19:40,606 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2021-05-02 22:19:40,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:19:40,632 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:19:40,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40 WrapperNode [2021-05-02 22:19:40,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:19:40,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:19:40,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:19:40,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:19:40,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:40,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:19:40,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:19:40,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:19:40,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:19:40,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:19:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:19:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:19:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:19:40,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:19:40,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:19:40,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:19:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:19:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:19:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:19:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:19:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:19:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:19:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:19:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:19:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:19:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:19:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:19:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:19:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:19:40,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:19:40,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:19:40,997 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:19:40,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:19:40 BoogieIcfgContainer [2021-05-02 22:19:40,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:19:40,999 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:19:40,999 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:19:40,999 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:19:41,001 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:19:40" (1/1) ... [2021-05-02 22:19:41,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:19:41 BasicIcfg [2021-05-02 22:19:41,012 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:19:41,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:19:41,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:19:41,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:19:41,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:19:40" (1/4) ... [2021-05-02 22:19:41,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7164c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:19:41, skipping insertion in model container [2021-05-02 22:19:41,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:19:40" (2/4) ... [2021-05-02 22:19:41,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7164c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:19:41, skipping insertion in model container [2021-05-02 22:19:41,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:19:40" (3/4) ... [2021-05-02 22:19:41,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7164c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:19:41, skipping insertion in model container [2021-05-02 22:19:41,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:19:41" (4/4) ... [2021-05-02 22:19:41,017 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound100.cJordan [2021-05-02 22:19:41,020 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:19:41,023 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:19:41,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:19:41,046 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:19:41,046 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:19:41,046 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:19:41,046 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:19:41,046 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:19:41,046 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:19:41,046 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:19:41,046 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:19:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:19:41,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:41,059 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:41,060 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:41,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2021-05-02 22:19:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:41,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317221015] [2021-05-02 22:19:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:19:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:41,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317221015] [2021-05-02 22:19:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317221015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:19:41,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:19:41,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:19:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2151942] [2021-05-02 22:19:41,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:19:41,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:19:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:19:41,302 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:19:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:41,356 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 22:19:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:19:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:19:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:41,362 INFO L225 Difference]: With dead ends: 24 [2021-05-02 22:19:41,362 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:19:41,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:19:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:19:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 22:19:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 22:19:41,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 22:19:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:41,383 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 22:19:41,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:19:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 22:19:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:19:41,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:41,384 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:41,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:19:41,385 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:41,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2021-05-02 22:19:41,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:41,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121023391] [2021-05-02 22:19:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:41,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:41,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620404398] [2021-05-02 22:19:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:19:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:41,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:41,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:41,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:41,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121023391] [2021-05-02 22:19:41,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:41,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620404398] [2021-05-02 22:19:41,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620404398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:19:41,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:19:41,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:19:41,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084671599] [2021-05-02 22:19:41,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:19:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:19:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:19:41,555 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:19:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:41,567 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-02 22:19:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:19:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:19:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:41,569 INFO L225 Difference]: With dead ends: 20 [2021-05-02 22:19:41,569 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 22:19:41,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:19:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 22:19:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 22:19:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 22:19:41,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 22:19:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:41,579 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 22:19:41,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:19:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 22:19:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:19:41,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:41,585 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:41,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:19:41,793 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2021-05-02 22:19:41,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:41,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123580835] [2021-05-02 22:19:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:41,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:41,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874840479] [2021-05-02 22:19:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:41,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:19:41,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:41,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123580835] [2021-05-02 22:19:41,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874840479] [2021-05-02 22:19:41,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874840479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:19:41,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:19:41,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:19:41,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70145667] [2021-05-02 22:19:41,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:19:41,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:19:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:19:41,906 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:19:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:41,969 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-02 22:19:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:19:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:19:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:41,970 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:19:41,970 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:19:41,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:19:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:19:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:19:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:19:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:19:41,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 22:19:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:41,974 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:19:41,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:19:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:19:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:19:41,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:41,987 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:42,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:42,203 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2021-05-02 22:19:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:42,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989905191] [2021-05-02 22:19:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:42,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:42,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373028463] [2021-05-02 22:19:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:19:42,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:42,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:42,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989905191] [2021-05-02 22:19:42,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:42,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373028463] [2021-05-02 22:19:42,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373028463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:42,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:42,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:19:42,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971340957] [2021-05-02 22:19:42,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:19:42,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:42,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:19:42,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:19:42,312 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:19:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:42,336 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 22:19:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:19:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:19:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:42,337 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:19:42,337 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 22:19:42,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:19:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 22:19:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 22:19:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:19:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 22:19:42,340 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 22:19:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:42,340 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 22:19:42,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:19:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 22:19:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:19:42,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:42,341 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:42,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:42,557 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2021-05-02 22:19:42,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:42,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936411448] [2021-05-02 22:19:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:42,564 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:42,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235848979] [2021-05-02 22:19:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:19:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:42,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936411448] [2021-05-02 22:19:42,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235848979] [2021-05-02 22:19:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235848979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:42,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:42,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:19:42,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102590534] [2021-05-02 22:19:42,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:19:42,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:42,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:19:42,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:19:42,762 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:19:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:45,736 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 22:19:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:19:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:19:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:45,739 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:19:45,739 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:19:45,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:19:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:19:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 22:19:45,742 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 22:19:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:45,742 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 22:19:45,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:19:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 22:19:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:19:45,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:45,745 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:45,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:45,946 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2021-05-02 22:19:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:45,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816005549] [2021-05-02 22:19:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:45,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:45,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114736004] [2021-05-02 22:19:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:19:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:46,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:19:46,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:46,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816005549] [2021-05-02 22:19:46,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:46,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114736004] [2021-05-02 22:19:46,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114736004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:46,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:46,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:19:46,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536506409] [2021-05-02 22:19:46,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:19:46,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:46,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:19:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:46,133 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:46,241 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 22:19:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:19:46,242 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 22:19:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:46,243 INFO L225 Difference]: With dead ends: 39 [2021-05-02 22:19:46,243 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:19:46,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:19:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:19:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:19:46,253 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:19:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:46,253 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:19:46,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:19:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:19:46,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:46,255 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:46,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:19:46,469 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash -382724699, now seen corresponding path program 2 times [2021-05-02 22:19:46,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:46,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454338174] [2021-05-02 22:19:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:46,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405617913] [2021-05-02 22:19:46,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:46,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:46,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:46,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:19:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:46,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:46,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:46,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454338174] [2021-05-02 22:19:46,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405617913] [2021-05-02 22:19:46,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405617913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:46,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:46,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:19:46,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218978995] [2021-05-02 22:19:46,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:19:46,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:46,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:19:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:19:46,631 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:46,665 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 22:19:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:19:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:19:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:46,667 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:19:46,667 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:19:46,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:19:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:19:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:19:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 22:19:46,670 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 22:19:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:46,670 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 22:19:46,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 22:19:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:19:46,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:46,670 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:46,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:46,873 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash -381652223, now seen corresponding path program 2 times [2021-05-02 22:19:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:46,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177306278] [2021-05-02 22:19:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:46,879 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:46,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669411938] [2021-05-02 22:19:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:46,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 22:19:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:46,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:46,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:19:47,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:47,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177306278] [2021-05-02 22:19:47,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:47,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669411938] [2021-05-02 22:19:47,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669411938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:47,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:47,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:19:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653136671] [2021-05-02 22:19:47,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:19:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:47,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:19:47,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:19:47,093 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:47,205 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 22:19:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:19:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:19:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:47,206 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:19:47,206 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:19:47,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:19:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:19:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:19:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 22:19:47,209 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 22:19:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:47,209 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 22:19:47,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:19:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 22:19:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:19:47,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:47,210 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:47,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:47,413 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2021-05-02 22:19:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:47,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761872519] [2021-05-02 22:19:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:47,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:47,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600225502] [2021-05-02 22:19:47,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:47,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:47,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:19:47,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:47,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 22:19:47,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761872519] [2021-05-02 22:19:47,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:47,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600225502] [2021-05-02 22:19:47,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600225502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:47,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:47,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:19:47,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482062418] [2021-05-02 22:19:47,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:19:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:19:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:47,590 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:19:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:47,694 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 22:19:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:19:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 22:19:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:47,695 INFO L225 Difference]: With dead ends: 47 [2021-05-02 22:19:47,695 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:19:47,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:19:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:19:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 22:19:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 22:19:47,698 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 22:19:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:47,698 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 22:19:47,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:19:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 22:19:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:19:47,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:47,698 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:47,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:19:47,914 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash 710880582, now seen corresponding path program 3 times [2021-05-02 22:19:47,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:47,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725877579] [2021-05-02 22:19:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:47,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:47,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962948649] [2021-05-02 22:19:47,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:47,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:19:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:47,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:19:47,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:47,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:48,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725877579] [2021-05-02 22:19:48,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962948649] [2021-05-02 22:19:48,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962948649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:48,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:48,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:19:48,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439227650] [2021-05-02 22:19:48,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:19:48,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:19:48,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:19:48,083 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:19:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:48,133 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 22:19:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:19:48,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 22:19:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:48,134 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:19:48,134 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 22:19:48,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 22:19:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 22:19:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 22:19:48,137 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 22:19:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:48,137 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 22:19:48,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:19:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 22:19:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:19:48,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:48,137 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:48,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:48,341 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:48,341 INFO L82 PathProgramCache]: Analyzing trace with hash 711953058, now seen corresponding path program 3 times [2021-05-02 22:19:48,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:48,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963373505] [2021-05-02 22:19:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:48,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:48,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392323243] [2021-05-02 22:19:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:48,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:19:48,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:19:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 22:19:48,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:48,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963373505] [2021-05-02 22:19:48,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392323243] [2021-05-02 22:19:48,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392323243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:48,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:48,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:19:48,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126176583] [2021-05-02 22:19:48,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:19:48,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:48,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:19:48,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:19:48,512 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:19:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:48,576 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 22:19:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:19:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 22:19:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:48,576 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:19:48,577 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:19:48,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:19:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 22:19:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 22:19:48,579 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 22:19:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:48,579 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 22:19:48,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:19:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 22:19:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:19:48,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:48,580 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:48,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:48,789 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2021-05-02 22:19:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:48,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938346404] [2021-05-02 22:19:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:48,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:48,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435569532] [2021-05-02 22:19:48,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:49,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:19:49,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:49,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:19:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:19:49,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:49,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938346404] [2021-05-02 22:19:49,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:49,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435569532] [2021-05-02 22:19:49,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435569532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:49,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:49,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:19:49,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524999467] [2021-05-02 22:19:49,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:19:49,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:19:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:49,209 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:49,270 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 22:19:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:19:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 22:19:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:49,271 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:19:49,271 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 22:19:49,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:19:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 22:19:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 22:19:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 22:19:49,274 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 22:19:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:49,274 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 22:19:49,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 22:19:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:19:49,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:49,274 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:49,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:19:49,478 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 4 times [2021-05-02 22:19:49,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:49,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319822804] [2021-05-02 22:19:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:49,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:49,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036255498] [2021-05-02 22:19:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:49,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:19:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 22:19:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:49,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:49,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:49,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319822804] [2021-05-02 22:19:49,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:49,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036255498] [2021-05-02 22:19:49,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036255498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:49,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:49,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:19:49,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417512909] [2021-05-02 22:19:49,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:19:49,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:49,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:19:49,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:19:49,625 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:49,682 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-02 22:19:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:19:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 22:19:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:49,683 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:19:49,683 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 22:19:49,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 22:19:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 22:19:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 22:19:49,685 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 22:19:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:49,685 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 22:19:49,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:19:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 22:19:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 22:19:49,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:49,686 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:49,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:19:49,897 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2021-05-02 22:19:49,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:49,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728811731] [2021-05-02 22:19:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:49,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:49,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14711715] [2021-05-02 22:19:49,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:49,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:19:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 22:19:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 22:19:50,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:50,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728811731] [2021-05-02 22:19:50,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:50,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14711715] [2021-05-02 22:19:50,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14711715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:50,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:50,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:19:50,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070054089] [2021-05-02 22:19:50,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:19:50,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:19:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:50,151 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:50,286 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-02 22:19:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:19:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 22:19:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:50,287 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:19:50,287 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:19:50,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:19:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:19:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 22:19:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:19:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 22:19:50,290 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 22:19:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:50,290 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 22:19:50,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 22:19:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 22:19:50,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:50,291 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:50,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 22:19:50,507 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:50,507 INFO L82 PathProgramCache]: Analyzing trace with hash 847694216, now seen corresponding path program 5 times [2021-05-02 22:19:50,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:50,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062419279] [2021-05-02 22:19:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:50,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:50,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262584024] [2021-05-02 22:19:50,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:50,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:19:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:19:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:50,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:50,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062419279] [2021-05-02 22:19:50,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262584024] [2021-05-02 22:19:50,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262584024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:50,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:50,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:19:50,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400992911] [2021-05-02 22:19:50,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:19:50,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:19:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:50,676 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:52,784 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-05-02 22:19:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:19:52,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-02 22:19:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:52,785 INFO L225 Difference]: With dead ends: 61 [2021-05-02 22:19:52,785 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 22:19:52,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:19:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 22:19:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 22:19:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:19:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 22:19:52,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 22:19:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:52,788 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 22:19:52,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:19:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 22:19:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 22:19:52,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:52,788 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:52,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:52,989 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2021-05-02 22:19:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528949561] [2021-05-02 22:19:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:52,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:52,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855635641] [2021-05-02 22:19:52,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:53,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:19:53,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 22:19:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 22:19:53,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:53,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528949561] [2021-05-02 22:19:53,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:53,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855635641] [2021-05-02 22:19:53,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855635641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:53,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:53,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:19:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829391117] [2021-05-02 22:19:53,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:19:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:19:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:19:53,276 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:19:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:53,417 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-02 22:19:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:19:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 22:19:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:53,425 INFO L225 Difference]: With dead ends: 66 [2021-05-02 22:19:53,425 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 22:19:53,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:19:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 22:19:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 22:19:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:19:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 22:19:53,428 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 22:19:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:53,428 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 22:19:53,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:19:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 22:19:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 22:19:53,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:53,429 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:53,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:53,630 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:53,630 INFO L82 PathProgramCache]: Analyzing trace with hash 268521001, now seen corresponding path program 6 times [2021-05-02 22:19:53,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:53,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126419582] [2021-05-02 22:19:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:53,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:53,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773744709] [2021-05-02 22:19:53,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:53,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:19:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:19:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:53,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:53,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126419582] [2021-05-02 22:19:53,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773744709] [2021-05-02 22:19:53,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773744709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:53,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:53,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:19:53,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989400892] [2021-05-02 22:19:53,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:19:53,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:19:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:53,963 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:19:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:54,053 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-05-02 22:19:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:19:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-02 22:19:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:54,054 INFO L225 Difference]: With dead ends: 69 [2021-05-02 22:19:54,054 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 22:19:54,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:19:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 22:19:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 22:19:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:19:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 22:19:54,059 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 22:19:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:54,059 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 22:19:54,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:19:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 22:19:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 22:19:54,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:54,060 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:54,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:54,266 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2021-05-02 22:19:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:54,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155205935] [2021-05-02 22:19:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:54,276 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:54,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10113397] [2021-05-02 22:19:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:54,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:19:54,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 22:19:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 22:19:54,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155205935] [2021-05-02 22:19:54,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10113397] [2021-05-02 22:19:54,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10113397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:54,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:54,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 22:19:54,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777862855] [2021-05-02 22:19:54,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 22:19:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 22:19:54,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:19:54,728 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:19:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:54,892 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-05-02 22:19:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:19:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-02 22:19:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:54,893 INFO L225 Difference]: With dead ends: 74 [2021-05-02 22:19:54,893 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 22:19:54,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:19:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 22:19:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 22:19:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:19:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 22:19:54,902 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 22:19:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:54,902 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 22:19:54,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:19:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 22:19:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:19:54,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:54,903 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:55,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 22:19:55,106 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416522, now seen corresponding path program 7 times [2021-05-02 22:19:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:55,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043166936] [2021-05-02 22:19:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:55,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:55,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458059831] [2021-05-02 22:19:55,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:19:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:55,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:55,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043166936] [2021-05-02 22:19:55,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458059831] [2021-05-02 22:19:55,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458059831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:55,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:55,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:19:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979976164] [2021-05-02 22:19:55,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:19:55,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:55,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:19:55,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:19:55,302 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:19:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:55,417 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-05-02 22:19:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:19:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-02 22:19:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:55,417 INFO L225 Difference]: With dead ends: 77 [2021-05-02 22:19:55,417 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 22:19:55,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:19:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 22:19:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 22:19:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:19:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 22:19:55,420 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 22:19:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:55,420 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 22:19:55,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:19:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 22:19:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 22:19:55,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:55,421 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:55,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 22:19:55,633 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2021-05-02 22:19:55,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:55,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357589021] [2021-05-02 22:19:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:55,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:55,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614655925] [2021-05-02 22:19:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 22:19:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:56,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 134 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 22:19:56,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:56,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357589021] [2021-05-02 22:19:56,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:56,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614655925] [2021-05-02 22:19:56,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614655925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:56,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:56,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:19:56,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866902548] [2021-05-02 22:19:56,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:19:56,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:56,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:19:56,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:19:56,389 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:19:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:56,581 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-05-02 22:19:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 22:19:56,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-02 22:19:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:56,582 INFO L225 Difference]: With dead ends: 82 [2021-05-02 22:19:56,582 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 22:19:56,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:19:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 22:19:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 22:19:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:19:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 22:19:56,584 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 22:19:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:56,585 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 22:19:56,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:19:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 22:19:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 22:19:56,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:56,585 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:56,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 22:19:56,790 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1451803755, now seen corresponding path program 8 times [2021-05-02 22:19:56,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:56,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491024986] [2021-05-02 22:19:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:56,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:56,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858021178] [2021-05-02 22:19:56,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:56,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 22:19:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:56,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:19:56,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:56,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491024986] [2021-05-02 22:19:56,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:56,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858021178] [2021-05-02 22:19:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858021178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:56,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:56,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:19:56,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052109099] [2021-05-02 22:19:56,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:19:56,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:19:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:56,990 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:19:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:57,853 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-02 22:19:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 22:19:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-02 22:19:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:57,854 INFO L225 Difference]: With dead ends: 85 [2021-05-02 22:19:57,854 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 22:19:57,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:19:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 22:19:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 22:19:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:19:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 22:19:57,856 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 22:19:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:57,856 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 22:19:57,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:19:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 22:19:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 22:19:57,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:57,857 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:58,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 22:19:58,069 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2021-05-02 22:19:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566984402] [2021-05-02 22:19:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:58,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:58,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105256365] [2021-05-02 22:19:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:58,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 22:19:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:00,522 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 22:20:20,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 161 refuted. 0 times theorem prover too weak. 120 trivial. 8 not checked. [2021-05-02 22:20:20,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:20,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566984402] [2021-05-02 22:20:20,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:20,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105256365] [2021-05-02 22:20:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105256365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:20,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:20,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 22:20:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158849975] [2021-05-02 22:20:20,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 22:20:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:20,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 22:20:20,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=209, Unknown=3, NotChecked=28, Total=272 [2021-05-02 22:20:20,260 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:20:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:20,462 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-05-02 22:20:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 22:20:20,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-02 22:20:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:20,463 INFO L225 Difference]: With dead ends: 90 [2021-05-02 22:20:20,464 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 22:20:20,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21664.0ms TimeCoverageRelationStatistics Valid=47, Invalid=296, Unknown=3, NotChecked=34, Total=380 [2021-05-02 22:20:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 22:20:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 22:20:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:20:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 22:20:20,466 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 22:20:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:20,466 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 22:20:20,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:20:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 22:20:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 22:20:20,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:20,467 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:20,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 22:20:20,671 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash -266881524, now seen corresponding path program 9 times [2021-05-02 22:20:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:20,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756164436] [2021-05-02 22:20:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:20,676 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:20,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44105787] [2021-05-02 22:20:20,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:21,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:20:21,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:20:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:21,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:21,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:21,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756164436] [2021-05-02 22:20:21,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:21,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44105787] [2021-05-02 22:20:21,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44105787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:21,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:21,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:20:21,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483740115] [2021-05-02 22:20:21,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:20:21,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:20:21,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:20:21,330 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:20:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:21,519 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-05-02 22:20:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 22:20:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-02 22:20:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:21,520 INFO L225 Difference]: With dead ends: 93 [2021-05-02 22:20:21,520 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 22:20:21,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:20:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 22:20:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 22:20:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:20:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 22:20:21,522 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 22:20:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:21,522 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 22:20:21,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:20:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 22:20:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 22:20:21,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:21,523 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:21,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:21,724 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:21,724 INFO L82 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2021-05-02 22:20:21,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:21,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410643213] [2021-05-02 22:20:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:21,731 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:21,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789566694] [2021-05-02 22:20:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:22,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:20:22,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 22:20:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:24,243 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0))) 0)) is different from true [2021-05-02 22:20:24,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:24,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:33,011 WARN L205 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 24 DAG size of output: 9 [2021-05-02 22:20:33,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:33,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:33,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:33,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 195 refuted. 0 times theorem prover too weak. 117 trivial. 9 not checked. [2021-05-02 22:20:33,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410643213] [2021-05-02 22:20:33,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789566694] [2021-05-02 22:20:33,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789566694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:33,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:33,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 22:20:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613333367] [2021-05-02 22:20:33,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 22:20:33,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 22:20:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=304, Unknown=2, NotChecked=34, Total=380 [2021-05-02 22:20:33,114 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:20:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:35,731 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-05-02 22:20:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:20:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-02 22:20:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:35,732 INFO L225 Difference]: With dead ends: 98 [2021-05-02 22:20:35,732 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 22:20:35,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 10747.9ms TimeCoverageRelationStatistics Valid=56, Invalid=408, Unknown=2, NotChecked=40, Total=506 [2021-05-02 22:20:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 22:20:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 22:20:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:20:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 22:20:35,734 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 22:20:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:35,734 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 22:20:35,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:20:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 22:20:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 22:20:35,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:35,735 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:35,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 22:20:35,947 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 10 times [2021-05-02 22:20:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:35,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055009164] [2021-05-02 22:20:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:35,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:35,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209857956] [2021-05-02 22:20:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:36,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:20:36,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 22:20:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:36,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:36,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055009164] [2021-05-02 22:20:36,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209857956] [2021-05-02 22:20:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209857956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:36,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:36,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 22:20:36,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903760010] [2021-05-02 22:20:36,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 22:20:36,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 22:20:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:20:36,975 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:20:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:37,226 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-05-02 22:20:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 22:20:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-02 22:20:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:37,233 INFO L225 Difference]: With dead ends: 101 [2021-05-02 22:20:37,233 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 22:20:37,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:20:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 22:20:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 22:20:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:20:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 22:20:37,239 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-02 22:20:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:37,240 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 22:20:37,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:20:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 22:20:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 22:20:37,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:37,240 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:37,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:37,444 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash 138382379, now seen corresponding path program 10 times [2021-05-02 22:20:37,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:37,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32045477] [2021-05-02 22:20:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:37,449 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:37,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577809379] [2021-05-02 22:20:37,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:37,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:20:37,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 22:20:37,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:37,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 251 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 22:20:38,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:38,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32045477] [2021-05-02 22:20:38,395 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:38,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577809379] [2021-05-02 22:20:38,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577809379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 22:20:38,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165332927] [2021-05-02 22:20:38,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 22:20:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 22:20:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:20:38,400 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:20:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:38,659 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-05-02 22:20:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:20:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-02 22:20:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:38,660 INFO L225 Difference]: With dead ends: 106 [2021-05-02 22:20:38,660 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 22:20:38,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:20:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 22:20:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 22:20:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:20:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-02 22:20:38,662 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-02 22:20:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:38,663 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-02 22:20:38,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:20:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-02 22:20:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 22:20:38,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:38,663 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:38,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 22:20:38,867 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash 697370190, now seen corresponding path program 11 times [2021-05-02 22:20:38,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:38,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186183713] [2021-05-02 22:20:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:38,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:38,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213029503] [2021-05-02 22:20:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:40,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 22:20:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:20:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:40,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:40,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:40,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186183713] [2021-05-02 22:20:40,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213029503] [2021-05-02 22:20:40,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213029503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:40,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:40,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:20:40,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465736259] [2021-05-02 22:20:40,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:20:40,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:20:40,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:20:40,303 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:20:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:40,527 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-05-02 22:20:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 22:20:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-02 22:20:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:40,528 INFO L225 Difference]: With dead ends: 109 [2021-05-02 22:20:40,528 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 22:20:40,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 22:20:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 22:20:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 22:20:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:20:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 22:20:40,531 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-02 22:20:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:40,531 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 22:20:40,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:20:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 22:20:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 22:20:40,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:40,532 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:40,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 22:20:40,736 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1036328716, now seen corresponding path program 11 times [2021-05-02 22:20:40,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:40,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676737224] [2021-05-02 22:20:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:40,740 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:40,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470784507] [2021-05-02 22:20:40,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:41,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 22:20:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:41,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 22:20:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:41,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 26 proven. 295 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 22:20:41,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:41,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676737224] [2021-05-02 22:20:41,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:41,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470784507] [2021-05-02 22:20:41,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470784507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:41,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:41,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 22:20:41,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512686169] [2021-05-02 22:20:41,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 22:20:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 22:20:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:20:41,979 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:20:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:42,325 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-05-02 22:20:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 22:20:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-02 22:20:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:42,326 INFO L225 Difference]: With dead ends: 114 [2021-05-02 22:20:42,326 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 22:20:42,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:20:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 22:20:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 22:20:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:20:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-02 22:20:42,329 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-02 22:20:42,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:42,329 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-02 22:20:42,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:20:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-02 22:20:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 22:20:42,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:42,330 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:42,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 22:20:42,545 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 335373551, now seen corresponding path program 12 times [2021-05-02 22:20:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:42,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526562239] [2021-05-02 22:20:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:42,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:42,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357566183] [2021-05-02 22:20:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:42,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 22:20:42,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:20:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:42,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:42,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:43,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:43,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526562239] [2021-05-02 22:20:43,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357566183] [2021-05-02 22:20:43,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357566183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:43,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:43,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:20:43,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125311175] [2021-05-02 22:20:43,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:20:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:20:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:20:43,037 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:20:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:43,559 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-05-02 22:20:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 22:20:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-02 22:20:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:43,560 INFO L225 Difference]: With dead ends: 117 [2021-05-02 22:20:43,560 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 22:20:43,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 22:20:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 22:20:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 22:20:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:20:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 22:20:43,564 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-02 22:20:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:43,564 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 22:20:43,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:20:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 22:20:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 22:20:43,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:43,565 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:43,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 22:20:43,769 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1975402733, now seen corresponding path program 12 times [2021-05-02 22:20:43,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:43,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305860161] [2021-05-02 22:20:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:43,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:43,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655799150] [2021-05-02 22:20:43,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:44,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 22:20:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:44,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 22:20:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:44,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 349 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-02 22:20:44,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305860161] [2021-05-02 22:20:44,623 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:44,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655799150] [2021-05-02 22:20:44,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655799150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:44,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:44,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:20:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158648640] [2021-05-02 22:20:44,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:20:44,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:20:44,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:20:44,625 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:20:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:44,985 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-05-02 22:20:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 22:20:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-02 22:20:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:44,986 INFO L225 Difference]: With dead ends: 122 [2021-05-02 22:20:44,986 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 22:20:44,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:20:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 22:20:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 22:20:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:20:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-02 22:20:44,990 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-02 22:20:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:44,990 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-02 22:20:44,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:20:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-02 22:20:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 22:20:44,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:44,991 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:45,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 22:20:45,192 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash 842371728, now seen corresponding path program 13 times [2021-05-02 22:20:45,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:45,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395356052] [2021-05-02 22:20:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:45,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:45,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742037325] [2021-05-02 22:20:45,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:20:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 22:20:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:45,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:45,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:45,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395356052] [2021-05-02 22:20:45,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:45,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742037325] [2021-05-02 22:20:45,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742037325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:45,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:45,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 22:20:45,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619737418] [2021-05-02 22:20:45,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 22:20:45,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 22:20:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:20:45,554 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:20:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:47,828 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2021-05-02 22:20:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 22:20:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-02 22:20:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:47,829 INFO L225 Difference]: With dead ends: 125 [2021-05-02 22:20:47,829 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 22:20:47,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:20:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 22:20:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 22:20:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:20:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 22:20:47,834 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-02 22:20:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:47,834 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 22:20:47,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:20:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 22:20:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 22:20:47,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:47,835 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:48,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:48,051 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash -953421362, now seen corresponding path program 13 times [2021-05-02 22:20:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:48,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900975098] [2021-05-02 22:20:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:48,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:48,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094203635] [2021-05-02 22:20:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:20:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 22:20:48,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:48,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 404 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 22:20:49,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:49,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900975098] [2021-05-02 22:20:49,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:49,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094203635] [2021-05-02 22:20:49,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094203635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:49,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:49,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:20:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167311675] [2021-05-02 22:20:49,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:20:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:20:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:20:49,025 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:20:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:49,403 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2021-05-02 22:20:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 22:20:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-02 22:20:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:49,404 INFO L225 Difference]: With dead ends: 130 [2021-05-02 22:20:49,404 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 22:20:49,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:20:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 22:20:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 22:20:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:20:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-02 22:20:49,407 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-02 22:20:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:49,407 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-02 22:20:49,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:20:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-02 22:20:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 22:20:49,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:49,408 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:49,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 22:20:49,612 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash -554004687, now seen corresponding path program 14 times [2021-05-02 22:20:49,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:49,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195905480] [2021-05-02 22:20:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:49,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:49,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966232150] [2021-05-02 22:20:49,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:49,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:20:49,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:49,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 22:20:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:49,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:49,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195905480] [2021-05-02 22:20:49,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966232150] [2021-05-02 22:20:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966232150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:49,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:49,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 22:20:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931180365] [2021-05-02 22:20:49,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 22:20:49,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:49,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 22:20:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:20:49,988 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:20:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:52,288 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-05-02 22:20:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 22:20:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-02 22:20:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:52,290 INFO L225 Difference]: With dead ends: 133 [2021-05-02 22:20:52,290 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 22:20:52,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 22:20:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 22:20:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 22:20:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:20:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 22:20:52,292 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-02 22:20:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:52,292 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 22:20:52,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:20:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 22:20:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 22:20:52,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:52,293 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:52,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 22:20:52,509 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1206963793, now seen corresponding path program 14 times [2021-05-02 22:20:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:52,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386041639] [2021-05-02 22:20:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:52,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:52,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607000317] [2021-05-02 22:20:52,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:53,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:20:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 22:20:53,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 29 proven. 463 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 22:20:53,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386041639] [2021-05-02 22:20:53,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607000317] [2021-05-02 22:20:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607000317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:53,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:53,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 22:20:53,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69098734] [2021-05-02 22:20:53,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 22:20:53,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 22:20:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:20:53,742 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:20:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:54,143 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-05-02 22:20:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 22:20:54,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-02 22:20:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:54,146 INFO L225 Difference]: With dead ends: 138 [2021-05-02 22:20:54,146 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 22:20:54,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-02 22:20:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 22:20:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 22:20:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:20:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-02 22:20:54,149 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-02 22:20:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:54,149 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-02 22:20:54,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:20:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-02 22:20:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 22:20:54,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:54,150 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:54,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 22:20:54,354 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash 604854994, now seen corresponding path program 15 times [2021-05-02 22:20:54,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:54,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297435560] [2021-05-02 22:20:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:54,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:54,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198726334] [2021-05-02 22:20:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:55,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 22:20:55,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:55,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 22:20:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:55,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:20:55,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297435560] [2021-05-02 22:20:55,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198726334] [2021-05-02 22:20:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198726334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 22:20:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569335953] [2021-05-02 22:20:55,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 22:20:55,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 22:20:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:20:55,627 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:20:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:55,992 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-05-02 22:20:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 22:20:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-02 22:20:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:55,997 INFO L225 Difference]: With dead ends: 141 [2021-05-02 22:20:55,997 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 22:20:55,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 22:20:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 22:20:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 22:20:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:20:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 22:20:56,004 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-02 22:20:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:56,004 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 22:20:56,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:20:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 22:20:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 22:20:56,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:56,005 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:20:56,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 22:20:56,210 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1030291600, now seen corresponding path program 15 times [2021-05-02 22:20:56,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:56,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690040890] [2021-05-02 22:20:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:56,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:56,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143056521] [2021-05-02 22:20:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:56,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 22:20:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 22:20:56,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:56,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:58,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 110 proven. 519 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-02 22:20:58,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690040890] [2021-05-02 22:20:58,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143056521] [2021-05-02 22:20:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143056521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:58,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:58,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 22:20:58,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786087956] [2021-05-02 22:20:58,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 22:20:58,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:58,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 22:20:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-05-02 22:20:58,481 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:21:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:00,962 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2021-05-02 22:21:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 22:21:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-02 22:21:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:00,964 INFO L225 Difference]: With dead ends: 146 [2021-05-02 22:21:00,964 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 22:21:00,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1523.3ms TimeCoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-05-02 22:21:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 22:21:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 22:21:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:21:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-02 22:21:00,966 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-02 22:21:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:00,967 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-02 22:21:00,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:21:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-02 22:21:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 22:21:00,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:00,967 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:01,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 22:21:01,172 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1171327629, now seen corresponding path program 16 times [2021-05-02 22:21:01,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:01,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756577121] [2021-05-02 22:21:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:01,176 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:01,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440052514] [2021-05-02 22:21:01,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:01,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:01,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 22:21:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:01,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:01,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:02,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:02,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756577121] [2021-05-02 22:21:02,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:02,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440052514] [2021-05-02 22:21:02,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440052514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:02,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:02,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 22:21:02,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112251807] [2021-05-02 22:21:02,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 22:21:02,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 22:21:02,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:21:02,352 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:21:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:02,887 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-05-02 22:21:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 22:21:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-02 22:21:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:02,888 INFO L225 Difference]: With dead ends: 149 [2021-05-02 22:21:02,888 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 22:21:02,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:21:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 22:21:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 22:21:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:21:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 22:21:02,891 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-02 22:21:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:02,891 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 22:21:02,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:21:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 22:21:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 22:21:02,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:02,892 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:03,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 22:21:03,096 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1153802639, now seen corresponding path program 16 times [2021-05-02 22:21:03,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:03,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833389686] [2021-05-02 22:21:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:03,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:03,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145373536] [2021-05-02 22:21:03,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:04,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:04,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 22:21:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:04,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 33 proven. 593 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 22:21:04,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833389686] [2021-05-02 22:21:04,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145373536] [2021-05-02 22:21:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145373536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:04,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:04,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 22:21:04,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655378123] [2021-05-02 22:21:04,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 22:21:04,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 22:21:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:21:04,579 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:21:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:05,071 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-05-02 22:21:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 22:21:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-02 22:21:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:05,072 INFO L225 Difference]: With dead ends: 154 [2021-05-02 22:21:05,072 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 22:21:05,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:21:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 22:21:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 22:21:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:21:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-02 22:21:05,074 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-02 22:21:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:05,075 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-02 22:21:05,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:21:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-02 22:21:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 22:21:05,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:05,075 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:05,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 22:21:05,280 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash 153116436, now seen corresponding path program 17 times [2021-05-02 22:21:05,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:05,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768831822] [2021-05-02 22:21:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:05,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:05,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018849812] [2021-05-02 22:21:05,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:05,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 22:21:05,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:05,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 22:21:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:06,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:06,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768831822] [2021-05-02 22:21:06,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:06,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018849812] [2021-05-02 22:21:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018849812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:06,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:06,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:21:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831629541] [2021-05-02 22:21:06,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:21:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:21:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:21:06,378 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:21:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:06,689 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2021-05-02 22:21:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 22:21:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 148 [2021-05-02 22:21:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:06,691 INFO L225 Difference]: With dead ends: 157 [2021-05-02 22:21:06,691 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 22:21:06,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 22:21:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 22:21:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-02 22:21:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:21:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 22:21:06,693 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 148 [2021-05-02 22:21:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:06,694 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 22:21:06,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:21:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 22:21:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 22:21:06,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:06,694 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:06,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:06,900 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 75778898, now seen corresponding path program 17 times [2021-05-02 22:21:06,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:06,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164428763] [2021-05-02 22:21:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:06,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:06,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530607883] [2021-05-02 22:21:06,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:09,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 22:21:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:09,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-02 22:21:09,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:09,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 41 proven. 658 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 22:21:10,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164428763] [2021-05-02 22:21:10,285 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530607883] [2021-05-02 22:21:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530607883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:10,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:10,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 22:21:10,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098001062] [2021-05-02 22:21:10,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 22:21:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 22:21:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-05-02 22:21:10,286 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:21:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:10,841 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2021-05-02 22:21:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 22:21:10,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 154 [2021-05-02 22:21:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:10,843 INFO L225 Difference]: With dead ends: 162 [2021-05-02 22:21:10,843 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 22:21:10,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-02 22:21:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 22:21:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-02 22:21:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:21:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-05-02 22:21:10,851 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2021-05-02 22:21:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:10,851 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-05-02 22:21:10,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:21:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-05-02 22:21:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 22:21:10,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:10,852 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:11,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 22:21:11,059 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash 664967093, now seen corresponding path program 18 times [2021-05-02 22:21:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:11,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969333887] [2021-05-02 22:21:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:11,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:11,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114880968] [2021-05-02 22:21:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:11,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 22:21:11,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 22:21:11,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:11,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:11,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:12,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969333887] [2021-05-02 22:21:12,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114880968] [2021-05-02 22:21:12,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114880968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:12,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:12,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 22:21:12,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989858311] [2021-05-02 22:21:12,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 22:21:12,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:12,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 22:21:12,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:21:12,177 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:21:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:12,521 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2021-05-02 22:21:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 22:21:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 156 [2021-05-02 22:21:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:12,522 INFO L225 Difference]: With dead ends: 165 [2021-05-02 22:21:12,522 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 22:21:12,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 22:21:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 22:21:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 22:21:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:21:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 22:21:12,525 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 156 [2021-05-02 22:21:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:12,525 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 22:21:12,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:21:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 22:21:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 22:21:12,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:12,526 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:12,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:12,731 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1531430707, now seen corresponding path program 18 times [2021-05-02 22:21:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:12,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422701850] [2021-05-02 22:21:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:12,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:12,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618475760] [2021-05-02 22:21:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:13,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 22:21:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:13,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 22:21:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 37 proven. 739 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 22:21:14,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422701850] [2021-05-02 22:21:14,161 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618475760] [2021-05-02 22:21:14,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618475760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:14,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:14,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 22:21:14,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091239828] [2021-05-02 22:21:14,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 22:21:14,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 22:21:14,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:21:14,162 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:21:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:17,986 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-05-02 22:21:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 22:21:17,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 162 [2021-05-02 22:21:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:17,987 INFO L225 Difference]: With dead ends: 170 [2021-05-02 22:21:17,987 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 22:21:17,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:21:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 22:21:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 22:21:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:21:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-05-02 22:21:17,990 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 162 [2021-05-02 22:21:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:17,990 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-05-02 22:21:17,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:21:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-05-02 22:21:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 22:21:17,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:17,991 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:18,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 22:21:18,196 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash -612982954, now seen corresponding path program 19 times [2021-05-02 22:21:18,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:18,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583747860] [2021-05-02 22:21:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:18,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:18,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266049675] [2021-05-02 22:21:18,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 22:21:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:18,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:18,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:18,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583747860] [2021-05-02 22:21:18,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:18,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266049675] [2021-05-02 22:21:18,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266049675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:18,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:18,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 22:21:18,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093748303] [2021-05-02 22:21:18,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 22:21:18,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 22:21:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 22:21:18,714 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:21:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:21,241 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2021-05-02 22:21:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 22:21:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 164 [2021-05-02 22:21:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:21,246 INFO L225 Difference]: With dead ends: 173 [2021-05-02 22:21:21,246 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 22:21:21,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 22:21:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 22:21:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 22:21:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:21:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 22:21:21,249 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 164 [2021-05-02 22:21:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:21,249 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 22:21:21,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:21:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 22:21:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 22:21:21,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:21,250 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:21,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:21,457 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1887818260, now seen corresponding path program 19 times [2021-05-02 22:21:21,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:21,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057426529] [2021-05-02 22:21:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:21,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:21,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994454531] [2021-05-02 22:21:21,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 22:21:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:22,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 39 proven. 818 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-05-02 22:21:22,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:22,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057426529] [2021-05-02 22:21:22,715 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:22,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994454531] [2021-05-02 22:21:22,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994454531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:22,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:22,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 22:21:22,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563069276] [2021-05-02 22:21:22,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 22:21:22,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 22:21:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:21:22,716 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:21:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:23,358 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2021-05-02 22:21:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 22:21:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 170 [2021-05-02 22:21:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:23,359 INFO L225 Difference]: With dead ends: 178 [2021-05-02 22:21:23,359 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 22:21:23,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:21:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 22:21:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 22:21:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:21:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-05-02 22:21:23,362 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2021-05-02 22:21:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:23,362 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-05-02 22:21:23,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:21:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-05-02 22:21:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 22:21:23,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:23,363 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:23,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:23,572 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1721928201, now seen corresponding path program 20 times [2021-05-02 22:21:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:23,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839232636] [2021-05-02 22:21:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:23,589 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:23,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723867862] [2021-05-02 22:21:23,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:23,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 22:21:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:23,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:24,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:24,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839232636] [2021-05-02 22:21:24,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:24,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723867862] [2021-05-02 22:21:24,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723867862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:24,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:24,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 22:21:24,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407556118] [2021-05-02 22:21:24,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 22:21:24,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 22:21:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:21:24,226 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:21:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:26,678 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2021-05-02 22:21:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 22:21:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 172 [2021-05-02 22:21:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:26,679 INFO L225 Difference]: With dead ends: 181 [2021-05-02 22:21:26,679 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 22:21:26,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 22:21:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 22:21:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 22:21:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:21:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-02 22:21:26,682 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 172 [2021-05-02 22:21:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:26,682 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-02 22:21:26,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:21:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-02 22:21:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 22:21:26,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:26,683 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:26,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 22:21:26,899 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:26,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1681878005, now seen corresponding path program 20 times [2021-05-02 22:21:26,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:26,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833386497] [2021-05-02 22:21:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:26,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:26,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668261940] [2021-05-02 22:21:26,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:28,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 22:21:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:28,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,463 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 22:21:32,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 41 proven. 881 refuted. 0 times theorem prover too weak. 780 trivial. 20 not checked. [2021-05-02 22:21:32,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:32,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833386497] [2021-05-02 22:21:32,701 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:32,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668261940] [2021-05-02 22:21:32,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668261940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:32,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:32,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-02 22:21:32,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104557498] [2021-05-02 22:21:32,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 22:21:32,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 22:21:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=703, Unknown=1, NotChecked=52, Total=812 [2021-05-02 22:21:32,703 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:21:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:33,376 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2021-05-02 22:21:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 22:21:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 178 [2021-05-02 22:21:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:33,377 INFO L225 Difference]: With dead ends: 186 [2021-05-02 22:21:33,377 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 22:21:33,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4419.2ms TimeCoverageRelationStatistics Valid=71, Invalid=862, Unknown=1, NotChecked=58, Total=992 [2021-05-02 22:21:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 22:21:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-05-02 22:21:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:21:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-05-02 22:21:33,380 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 178 [2021-05-02 22:21:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:33,380 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-05-02 22:21:33,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:21:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-05-02 22:21:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 22:21:33,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:33,381 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:33,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:33,586 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2062017640, now seen corresponding path program 21 times [2021-05-02 22:21:33,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:33,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658254501] [2021-05-02 22:21:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:33,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:33,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796260688] [2021-05-02 22:21:33,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:34,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 22:21:34,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:34,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 22:21:34,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:34,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:35,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:35,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658254501] [2021-05-02 22:21:35,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:35,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796260688] [2021-05-02 22:21:35,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796260688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:35,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:35,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 22:21:35,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039087757] [2021-05-02 22:21:35,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 22:21:35,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 22:21:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 22:21:35,202 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:21:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:35,652 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2021-05-02 22:21:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 22:21:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 180 [2021-05-02 22:21:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:35,653 INFO L225 Difference]: With dead ends: 189 [2021-05-02 22:21:35,653 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 22:21:35,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 502.4ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 22:21:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 22:21:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 22:21:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:21:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-05-02 22:21:35,656 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 180 [2021-05-02 22:21:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:35,656 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-05-02 22:21:35,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:21:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-05-02 22:21:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 22:21:35,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:35,657 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:35,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 22:21:35,863 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash -982149930, now seen corresponding path program 21 times [2021-05-02 22:21:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:35,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135041845] [2021-05-02 22:21:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:35,868 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:35,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654885560] [2021-05-02 22:21:35,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:37,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 22:21:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 22:21:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:37,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 43 proven. 988 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-05-02 22:21:38,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:38,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135041845] [2021-05-02 22:21:38,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:38,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654885560] [2021-05-02 22:21:38,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654885560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:38,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:38,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 22:21:38,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289064533] [2021-05-02 22:21:38,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 22:21:38,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:38,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 22:21:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:21:38,258 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:21:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:40,996 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2021-05-02 22:21:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 22:21:40,996 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 186 [2021-05-02 22:21:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:40,997 INFO L225 Difference]: With dead ends: 194 [2021-05-02 22:21:40,997 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 22:21:40,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:21:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 22:21:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 22:21:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:21:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-05-02 22:21:41,000 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 186 [2021-05-02 22:21:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:41,000 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-05-02 22:21:41,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:21:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-05-02 22:21:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 22:21:41,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:41,001 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:41,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:41,206 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:41,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1902612537, now seen corresponding path program 22 times [2021-05-02 22:21:41,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:41,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480573900] [2021-05-02 22:21:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:41,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:41,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781716827] [2021-05-02 22:21:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:42,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:42,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 22:21:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:43,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480573900] [2021-05-02 22:21:43,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781716827] [2021-05-02 22:21:43,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781716827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:43,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:43,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 22:21:43,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950249353] [2021-05-02 22:21:43,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 22:21:43,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 22:21:43,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 22:21:43,122 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:21:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:45,608 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2021-05-02 22:21:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 22:21:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 188 [2021-05-02 22:21:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:45,609 INFO L225 Difference]: With dead ends: 197 [2021-05-02 22:21:45,609 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 22:21:45,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 22:21:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 22:21:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-05-02 22:21:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:21:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-05-02 22:21:45,613 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 188 [2021-05-02 22:21:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:45,613 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-05-02 22:21:45,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:21:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-05-02 22:21:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 22:21:45,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:45,614 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:45,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 22:21:45,819 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1842787145, now seen corresponding path program 22 times [2021-05-02 22:21:45,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:45,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585953261] [2021-05-02 22:21:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:45,823 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:45,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586603902] [2021-05-02 22:21:45,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:47,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:47,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-02 22:21:47,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:47,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 45 proven. 1079 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-05-02 22:21:48,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:48,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585953261] [2021-05-02 22:21:48,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:48,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586603902] [2021-05-02 22:21:48,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586603902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:48,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:48,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 22:21:48,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98503143] [2021-05-02 22:21:48,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 22:21:48,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 22:21:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:21:48,113 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:21:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:48,867 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2021-05-02 22:21:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 22:21:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 194 [2021-05-02 22:21:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:48,868 INFO L225 Difference]: With dead ends: 202 [2021-05-02 22:21:48,868 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 22:21:48,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:21:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 22:21:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-05-02 22:21:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:21:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-05-02 22:21:48,871 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2021-05-02 22:21:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:48,871 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-05-02 22:21:48,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:21:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-05-02 22:21:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 22:21:48,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:48,872 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:49,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:49,077 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash -536030246, now seen corresponding path program 23 times [2021-05-02 22:21:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:49,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023050771] [2021-05-02 22:21:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:49,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:49,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487330879] [2021-05-02 22:21:49,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true