/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:18:52,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:18:52,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:18:52,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:18:52,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:18:52,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:18:52,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:18:52,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:18:52,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:18:52,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:18:52,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:18:52,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:18:52,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:18:52,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:18:52,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:18:52,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:18:52,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:18:52,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:18:52,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:18:52,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:18:52,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:18:52,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:18:52,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:18:52,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:18:52,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:18:52,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:18:52,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:18:52,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:18:52,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:18:52,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:18:52,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:18:52,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:18:52,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:18:52,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:18:52,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:18:52,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:18:52,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:18:52,335 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:18:52,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:18:52,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:18:52,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:18:52,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:18:52,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:18:52,587 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:18:52,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-02 22:18:52,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8ba43ce/fdda32f236d3460193c411f744f9a4b8/FLAGc5693a7f9 [2021-05-02 22:18:53,000 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:18:53,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-02 22:18:53,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8ba43ce/fdda32f236d3460193c411f744f9a4b8/FLAGc5693a7f9 [2021-05-02 22:18:53,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8ba43ce/fdda32f236d3460193c411f744f9a4b8 [2021-05-02 22:18:53,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:18:53,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:18:53,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:18:53,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:18:53,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:18:53,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16032ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53, skipping insertion in model container [2021-05-02 22:18:53,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:18:53,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:18:53,166 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_unwindbound10.c[458,471] [2021-05-02 22:18:53,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:18:53,189 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:18:53,200 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_unwindbound10.c[458,471] [2021-05-02 22:18:53,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:18:53,225 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:18:53,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53 WrapperNode [2021-05-02 22:18:53,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:18:53,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:18:53,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:18:53,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:18:53,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:18:53,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:18:53,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:18:53,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:18:53,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (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 22:18:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:18:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:18:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:18:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:18:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:18:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:18:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:18:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:18:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:18:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:18:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:18:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:18:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:18:53,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:18:53,528 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:18:53,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:18:53 BoogieIcfgContainer [2021-05-02 22:18:53,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:18:53,529 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:18:53,529 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:18:53,530 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:18:53,532 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:18:53" (1/1) ... [2021-05-02 22:18:53,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:18:53 BasicIcfg [2021-05-02 22:18:53,546 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:18:53,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:18:53,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:18:53,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:18:53,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:18:53" (1/4) ... [2021-05-02 22:18:53,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c45676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:18:53, skipping insertion in model container [2021-05-02 22:18:53,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:18:53" (2/4) ... [2021-05-02 22:18:53,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c45676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:18:53, skipping insertion in model container [2021-05-02 22:18:53,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:18:53" (3/4) ... [2021-05-02 22:18:53,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c45676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:18:53, skipping insertion in model container [2021-05-02 22:18:53,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:18:53" (4/4) ... [2021-05-02 22:18:53,552 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.cJordan [2021-05-02 22:18:53,555 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:18:53,558 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:18:53,569 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:18:53,593 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:18:53,593 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:18:53,593 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:18:53,593 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:18:53,593 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:18:53,593 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:18:53,593 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:18:53,593 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:18:53,602 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 22:18:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:18:53,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:18:53,621 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:18:53,621 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:18:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:18:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2021-05-02 22:18:53,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:18:53,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710472628] [2021-05-02 22:18:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:18:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:18:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:18:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:18:53,847 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 22:18:53,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:18:53,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710472628] [2021-05-02 22:18:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710472628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:18:53,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:18:53,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:18:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351196533] [2021-05-02 22:18:53,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:18:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:18:53,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:18:53,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:18:53,866 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 22:18:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:18:53,928 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 22:18:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:18:53,929 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 22:18:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:18:53,935 INFO L225 Difference]: With dead ends: 24 [2021-05-02 22:18:53,936 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:18:53,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:18:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:18:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 22:18:53,958 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 22:18:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 22:18:53,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 22:18:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:18:53,960 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 22:18:53,960 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 22:18:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 22:18:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:18:53,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:18:53,961 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:18:53,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:18:53,962 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:18:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:18:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2021-05-02 22:18:53,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:18:53,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360039166] [2021-05-02 22:18:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:18:53,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:18:53,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342084306] [2021-05-02 22:18:53,984 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 22:18:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:18:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:18:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:18:54,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,155 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 22:18:54,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:18:54,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360039166] [2021-05-02 22:18:54,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:18:54,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342084306] [2021-05-02 22:18:54,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342084306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:18:54,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:18:54,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:18:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121896665] [2021-05-02 22:18:54,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:18:54,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:18:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:18:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:18:54,160 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 22:18:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:18:54,173 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-02 22:18:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:18:54,175 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 22:18:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:18:54,176 INFO L225 Difference]: With dead ends: 20 [2021-05-02 22:18:54,176 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 22:18:54,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:18:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 22:18:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 22:18:54,181 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 22:18:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 22:18:54,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 22:18:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:18:54,186 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 22:18:54,186 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 22:18:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 22:18:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:18:54,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:18:54,186 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:18:54,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:18:54,389 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:18:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:18:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2021-05-02 22:18:54,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:18:54,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118094062] [2021-05-02 22:18:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:18:54,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:18:54,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263133698] [2021-05-02 22:18:54,396 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 22:18:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:18:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:18:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:18:54,501 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 22:18:54,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:18:54,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118094062] [2021-05-02 22:18:54,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:18:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263133698] [2021-05-02 22:18:54,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263133698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:18:54,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:18:54,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:18:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829070097] [2021-05-02 22:18:54,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:18:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:18:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:18:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:18:54,503 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 22:18:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:18:54,549 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-02 22:18:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:18:54,549 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 22:18:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:18:54,550 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:18:54,550 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:18:54,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:18:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:18:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:18:54,557 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 22:18:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:18:54,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 22:18:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:18:54,559 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:18:54,559 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 22:18:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:18:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:18:54,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:18:54,560 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 22:18:54,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:18:54,769 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:18:54,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:18:54,770 INFO L82 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2021-05-02 22:18:54,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:18:54,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746594644] [2021-05-02 22:18:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:18:54,777 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:18:54,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102350958] [2021-05-02 22:18:54,777 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 22:18:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:18:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:18:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:18:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:18:54,917 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 22:18:54,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:18:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746594644] [2021-05-02 22:18:54,917 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:18:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102350958] [2021-05-02 22:18:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102350958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:18:54,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:18:54,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:18:54,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223457445] [2021-05-02 22:18:54,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:18:54,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:18:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:18:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:18:54,918 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 22:18:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:18:54,944 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 22:18:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:18:54,944 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 22:18:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:18:54,945 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:18:54,945 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 22:18:54,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:18:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 22:18:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 22:18:54,947 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 22:18:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 22:18:54,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 22:18:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:18:54,948 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 22:18:54,948 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 22:18:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 22:18:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:18:54,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:18:54,949 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:18:55,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:18:55,165 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:18:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:18:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2021-05-02 22:18:55,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:18:55,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963776463] [2021-05-02 22:18:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:18:55,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:18:55,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768013819] [2021-05-02 22:18:55,173 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 22:18:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:18:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:18:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:18:55,307 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 22:18:55,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:18:55,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963776463] [2021-05-02 22:18:55,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:18:55,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768013819] [2021-05-02 22:18:55,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768013819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:18:55,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:18:55,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:18:55,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247264532] [2021-05-02 22:18:55,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:18:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:18:55,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:18:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:18:55,309 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 22:19:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:00,317 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 22:19:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:19:00,318 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 22:19:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:00,319 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:19:00,319 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:19:00,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:19:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:19:00,322 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 22:19:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 22:19:00,322 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 22:19:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:00,322 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 22:19:00,322 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 22:19:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 22:19:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:19:00,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:00,323 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 22:19:00,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:00,533 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2021-05-02 22:19:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:00,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573968508] [2021-05-02 22:19:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:00,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:00,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245021536] [2021-05-02 22:19:00,540 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 22:19:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:19:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:19:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:00,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:00,740 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 22:19:00,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:00,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573968508] [2021-05-02 22:19:00,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:00,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245021536] [2021-05-02 22:19:00,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245021536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:00,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:00,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:19:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353826862] [2021-05-02 22:19:00,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:19:00,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:19:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:00,742 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 22:19:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:00,828 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 22:19:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:19:00,829 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 22:19:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:00,830 INFO L225 Difference]: With dead ends: 39 [2021-05-02 22:19:00,830 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:19:00,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:19:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:19:00,838 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 22:19:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:19:00,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:19:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:00,839 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:19:00,840 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 22:19:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:19:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:19:00,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:00,841 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 22:19:01,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:19:01,057 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -382724699, now seen corresponding path program 2 times [2021-05-02 22:19:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:01,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253656234] [2021-05-02 22:19:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:01,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:01,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689454738] [2021-05-02 22:19:01,066 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 22:19:01,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:01,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:01,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:19:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:01,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,197 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 22:19:01,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253656234] [2021-05-02 22:19:01,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689454738] [2021-05-02 22:19:01,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689454738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:01,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:01,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:19:01,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985233608] [2021-05-02 22:19:01,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:19:01,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:19:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:19:01,199 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 22:19:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:01,233 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 22:19:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:19:01,234 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 22:19:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:01,235 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:19:01,235 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:19:01,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:19:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:19:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:19:01,237 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 22:19:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 22:19:01,238 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 22:19:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:01,238 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 22:19:01,238 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 22:19:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 22:19:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:19:01,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:01,239 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:01,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:01,453 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -381652223, now seen corresponding path program 2 times [2021-05-02 22:19:01,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:01,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645466075] [2021-05-02 22:19:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:01,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:01,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656597149] [2021-05-02 22:19:01,472 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 22:19:01,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:01,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:01,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 22:19:01,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:01,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:01,675 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 22:19:01,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:01,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645466075] [2021-05-02 22:19:01,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:01,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656597149] [2021-05-02 22:19:01,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656597149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:01,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:01,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:19:01,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518942409] [2021-05-02 22:19:01,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:19:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:01,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:19:01,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:19:01,680 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 22:19:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:03,792 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 22:19:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:19:03,793 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 22:19:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:03,793 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:19:03,793 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:19:03,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:19:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:19:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:19:03,796 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 22:19:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 22:19:03,797 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 22:19:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:03,797 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 22:19:03,797 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 22:19:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 22:19:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:19:03,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:03,798 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 22:19:04,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:04,001 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2021-05-02 22:19:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:04,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597875425] [2021-05-02 22:19:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:04,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:04,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850851058] [2021-05-02 22:19:04,007 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 22:19:04,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:19:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:19:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:04,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,169 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 22:19:04,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:04,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597875425] [2021-05-02 22:19:04,169 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:04,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850851058] [2021-05-02 22:19:04,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850851058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:04,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:04,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:19:04,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120811575] [2021-05-02 22:19:04,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:19:04,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:04,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:19:04,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:04,171 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 22:19:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:04,280 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 22:19:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:19:04,280 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 22:19:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:04,282 INFO L225 Difference]: With dead ends: 47 [2021-05-02 22:19:04,282 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:19:04,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:19:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:19:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 22:19:04,295 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 22:19:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 22:19:04,296 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 22:19:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:04,296 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 22:19:04,296 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 22:19:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 22:19:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:19:04,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:04,297 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 22:19:04,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:19:04,515 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash 710880582, now seen corresponding path program 3 times [2021-05-02 22:19:04,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:04,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321244761] [2021-05-02 22:19:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:04,521 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:04,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982210777] [2021-05-02 22:19:04,521 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 22:19:04,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:19:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:19:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:04,657 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 22:19:04,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321244761] [2021-05-02 22:19:04,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982210777] [2021-05-02 22:19:04,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982210777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:04,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:04,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:19:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214981938] [2021-05-02 22:19:04,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:19:04,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:19:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:19:04,659 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 22:19:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:04,710 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 22:19:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:19:04,711 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 22:19:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:04,712 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:19:04,712 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 22:19:04,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:19:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 22:19:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 22:19:04,714 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 22:19:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 22:19:04,714 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 22:19:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:04,715 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 22:19:04,715 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 22:19:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 22:19:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:19:04,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:04,715 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:19:04,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:04,924 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:04,924 INFO L82 PathProgramCache]: Analyzing trace with hash 711953058, now seen corresponding path program 3 times [2021-05-02 22:19:04,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:04,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094511585] [2021-05-02 22:19:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:04,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:04,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243269354] [2021-05-02 22:19:04,930 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 22:19:04,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:19:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:19:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:05,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,121 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 22:19:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094511585] [2021-05-02 22:19:05,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243269354] [2021-05-02 22:19:05,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243269354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:05,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:05,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:19:05,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388759210] [2021-05-02 22:19:05,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:19:05,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:19:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:19:05,122 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 22:19:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:05,172 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 22:19:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:19:05,172 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 22:19:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:05,173 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:19:05,173 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:19:05,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:19:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 22:19:05,175 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 22:19:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 22:19:05,175 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 22:19:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:05,175 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 22:19:05,175 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 22:19:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 22:19:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:19:05,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:05,176 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 22:19:05,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:05,398 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2021-05-02 22:19:05,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:05,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710196921] [2021-05-02 22:19:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:05,404 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:05,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824603448] [2021-05-02 22:19:05,404 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 22:19:05,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:19:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:19:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:05,816 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 22:19:05,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:05,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710196921] [2021-05-02 22:19:05,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:05,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824603448] [2021-05-02 22:19:05,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824603448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:05,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:05,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:19:05,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960910970] [2021-05-02 22:19:05,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:19:05,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:19:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:05,818 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 22:19:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:05,878 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 22:19:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:19:05,879 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 22:19:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:05,880 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:19:05,880 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 22:19:05,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:19:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 22:19:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 22:19:05,881 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 22:19:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 22:19:05,884 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 22:19:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:05,884 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 22:19:05,884 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 22:19:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 22:19:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:19:05,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:05,885 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 22:19:06,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:19:06,088 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 4 times [2021-05-02 22:19:06,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:06,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216906460] [2021-05-02 22:19:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:06,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:06,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606738650] [2021-05-02 22:19:06,094 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 22:19:06,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:19:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 22:19:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:06,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:06,254 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 22:19:06,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:06,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216906460] [2021-05-02 22:19:06,254 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:06,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606738650] [2021-05-02 22:19:06,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606738650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:06,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:06,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:19:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723127027] [2021-05-02 22:19:06,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:19:06,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:06,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:19:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:19:06,255 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 22:19:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:06,322 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-02 22:19:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:19:06,322 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 22:19:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:06,323 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:19:06,323 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 22:19:06,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 22:19:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 22:19:06,330 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 22:19:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 22:19:06,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 22:19:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:06,331 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 22:19:06,331 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 22:19:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 22:19:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 22:19:06,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:06,333 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 22:19:06,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:19:06,545 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2021-05-02 22:19:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:06,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565930441] [2021-05-02 22:19:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:06,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:06,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549085071] [2021-05-02 22:19:06,550 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 22:19:06,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:19:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 22:19:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,170 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 22:19:07,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:07,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565930441] [2021-05-02 22:19:07,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:07,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549085071] [2021-05-02 22:19:07,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549085071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:07,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:07,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:19:07,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727285450] [2021-05-02 22:19:07,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:19:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:19:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:19:07,172 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 22:19:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:07,290 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-02 22:19:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:19:07,291 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 22:19:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:07,291 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:19:07,291 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:19:07,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:19:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:19:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 22:19:07,293 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 22:19:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 22:19:07,294 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 22:19:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:07,294 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 22:19:07,294 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 22:19:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 22:19:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 22:19:07,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:07,294 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 22:19:07,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 22:19:07,495 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 847694216, now seen corresponding path program 5 times [2021-05-02 22:19:07,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:07,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481251927] [2021-05-02 22:19:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:07,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:07,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687053018] [2021-05-02 22:19:07,500 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 22:19:07,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:19:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:19:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:07,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:07,682 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 22:19:07,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:19:07,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481251927] [2021-05-02 22:19:07,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:19:07,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687053018] [2021-05-02 22:19:07,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687053018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:19:07,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:19:07,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:19:07,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051047034] [2021-05-02 22:19:07,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:19:07,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:19:07,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:19:07,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:19:07,683 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 22:19:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:19:07,788 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-05-02 22:19:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:19:07,789 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 22:19:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:19:07,789 INFO L225 Difference]: With dead ends: 61 [2021-05-02 22:19:07,789 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 22:19:07,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:19:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 22:19:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 22:19:07,791 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 22:19:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 22:19:07,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 22:19:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:19:07,791 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 22:19:07,791 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 22:19:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 22:19:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 22:19:07,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:19:07,792 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 22:19:07,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:19:07,993 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:19:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:19:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2021-05-02 22:19:07,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:19:07,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014871405] [2021-05-02 22:19:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:19:07,997 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:19:07,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219244481] [2021-05-02 22:19:07,997 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 22:19:08,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:19:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:19:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 22:19:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:19:08,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:08,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:19:08,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,584 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 1) (= (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) (= c_main_~y~0 1) (< c_main_~c~0 (+ c_main_~k~0 1))) is different from true [2021-05-02 22:20:51,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 68 refuted. 0 times theorem prover too weak. 45 trivial. 5 not checked. [2021-05-02 22:20:51,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:51,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014871405] [2021-05-02 22:20:51,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:51,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219244481] [2021-05-02 22:20:51,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219244481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:51,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:51,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 22:20:51,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426867409] [2021-05-02 22:20:51,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 22:20:51,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:51,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 22:20:51,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2021-05-02 22:20:51,734 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) 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 22:20:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:51,872 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-02 22:20:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:20:51,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) 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 22:20:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:51,873 INFO L225 Difference]: With dead ends: 66 [2021-05-02 22:20:51,873 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 22:20:51,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103568.9ms TimeCoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2021-05-02 22:20:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 22:20:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 22:20:51,875 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 22:20:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 22:20:51,876 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 22:20:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:51,876 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 22:20:51,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) 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 22:20:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 22:20:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 22:20:51,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:51,877 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 22:20:52,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:52,092 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash 268521001, now seen corresponding path program 6 times [2021-05-02 22:20:52,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:52,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701168372] [2021-05-02 22:20:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:52,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597065075] [2021-05-02 22:20:52,097 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 22:20:52,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:20:52,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:20:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:52,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:52,462 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 22:20:52,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701168372] [2021-05-02 22:20:52,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597065075] [2021-05-02 22:20:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597065075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:52,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:52,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:20:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615949432] [2021-05-02 22:20:52,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:20:52,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:52,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:20:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:20:52,467 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 22:20:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:52,576 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-05-02 22:20:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:20:52,577 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 22:20:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:52,577 INFO L225 Difference]: With dead ends: 69 [2021-05-02 22:20:52,577 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 22:20:52,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:20:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 22:20:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 22:20:52,579 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 22:20:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 22:20:52,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 22:20:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:52,580 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 22:20:52,580 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 22:20:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 22:20:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 22:20:52,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:52,580 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 22:20:52,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:52,781 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2021-05-02 22:20:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:52,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061840741] [2021-05-02 22:20:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:52,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:52,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664757895] [2021-05-02 22:20:52,788 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 22:20:53,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:20:53,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 22:20:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:53,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,322 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 22:20:53,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061840741] [2021-05-02 22:20:53,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664757895] [2021-05-02 22:20:53,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664757895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:53,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:53,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 22:20:53,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355595420] [2021-05-02 22:20:53,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 22:20:53,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 22:20:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:20:53,323 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 22:20:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:53,470 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-05-02 22:20:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:20:53,471 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 22:20:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:53,471 INFO L225 Difference]: With dead ends: 74 [2021-05-02 22:20:53,471 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 22:20:53,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:20:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 22:20:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 22:20:53,473 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 22:20:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 22:20:53,474 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 22:20:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:53,474 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 22:20:53,474 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 22:20:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 22:20:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:20:53,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:53,474 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 22:20:53,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 22:20:53,678 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416522, now seen corresponding path program 7 times [2021-05-02 22:20:53,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:53,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320933509] [2021-05-02 22:20:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:53,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931754094] [2021-05-02 22:20:53,687 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 22:20:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:20:53,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:20:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:53,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:53,891 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 22:20:53,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:53,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320933509] [2021-05-02 22:20:53,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:53,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931754094] [2021-05-02 22:20:53,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931754094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:53,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:53,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:20:53,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795789836] [2021-05-02 22:20:53,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:20:53,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:20:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:20:53,893 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 22:20:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:54,008 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-05-02 22:20:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:20:54,008 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 22:20:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:54,009 INFO L225 Difference]: With dead ends: 77 [2021-05-02 22:20:54,009 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 22:20:54,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:20:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 22:20:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 22:20:54,010 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 22:20:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 22:20:54,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 22:20:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:54,011 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 22:20:54,011 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 22:20:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 22:20:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 22:20:54,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:54,012 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 22:20:54,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 22:20:54,224 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2021-05-02 22:20:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873797149] [2021-05-02 22:20:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:54,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:54,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260734248] [2021-05-02 22:20:54,232 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 22:20:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:20:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 22:20:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:54,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,070 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 22:20:55,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:55,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873797149] [2021-05-02 22:20:55,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:55,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260734248] [2021-05-02 22:20:55,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260734248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:55,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:55,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:20:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350306285] [2021-05-02 22:20:55,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:20:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:20:55,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:20:55,071 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 22:20:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:55,264 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-05-02 22:20:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 22:20:55,268 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 22:20:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:55,271 INFO L225 Difference]: With dead ends: 82 [2021-05-02 22:20:55,271 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 22:20:55,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:20:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 22:20:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 22:20:55,273 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 22:20:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 22:20:55,273 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 22:20:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:55,273 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 22:20:55,273 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 22:20:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 22:20:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 22:20:55,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:55,274 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 22:20:55,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 22:20:55,479 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:55,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1451803755, now seen corresponding path program 8 times [2021-05-02 22:20:55,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:55,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823224922] [2021-05-02 22:20:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:55,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:55,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233268424] [2021-05-02 22:20:55,483 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 22:20:55,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:20:55,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 22:20:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:55,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,571 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 22:20:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:55,727 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 22:20:55,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:55,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823224922] [2021-05-02 22:20:55,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:55,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233268424] [2021-05-02 22:20:55,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233268424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:55,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:55,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:20:55,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843491208] [2021-05-02 22:20:55,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:20:55,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:55,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:20:55,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:20:55,728 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 22:20:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:55,869 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-02 22:20:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 22:20:55,870 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 22:20:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:55,870 INFO L225 Difference]: With dead ends: 85 [2021-05-02 22:20:55,870 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 22:20:55,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:20:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 22:20:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 22:20:55,872 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 22:20:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 22:20:55,872 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 22:20:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:55,873 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 22:20:55,873 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 22:20:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 22:20:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 22:20:55,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:55,873 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 22:20:56,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 22:20:56,081 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2021-05-02 22:20:56,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:56,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826895279] [2021-05-02 22:20:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:56,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:56,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635332226] [2021-05-02 22:20:56,085 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 22:20:56,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:20:56,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:56,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 22:20:56,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:56,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 169 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 22:20:56,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826895279] [2021-05-02 22:20:56,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635332226] [2021-05-02 22:20:56,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635332226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:56,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:56,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:20:56,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329088935] [2021-05-02 22:20:56,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:20:56,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:56,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:20:56,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:20:56,892 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.6) 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 22:20:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:57,123 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-05-02 22:20:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:20:57,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) 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 22:20:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:57,124 INFO L225 Difference]: With dead ends: 90 [2021-05-02 22:20:57,124 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 22:20:57,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:20:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 22:20:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 22:20:57,126 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 22:20:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 22:20:57,126 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 22:20:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:57,126 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 22:20:57,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.6) 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 22:20:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 22:20:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 22:20:57,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:57,127 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 22:20:57,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 22:20:57,335 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash -266881524, now seen corresponding path program 9 times [2021-05-02 22:20:57,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:57,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775248581] [2021-05-02 22:20:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:57,339 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:57,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369952986] [2021-05-02 22:20:57,340 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 22:20:57,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:20:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:20:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:20:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:20:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:20:57,963 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 22:20:57,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:20:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775248581] [2021-05-02 22:20:57,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:20:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369952986] [2021-05-02 22:20:57,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369952986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:20:57,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:20:57,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:20:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030530071] [2021-05-02 22:20:57,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:20:57,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:20:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:20:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:20:57,964 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 22:20:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:20:59,572 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-05-02 22:20:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 22:20:59,572 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 22:20:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:20:59,573 INFO L225 Difference]: With dead ends: 93 [2021-05-02 22:20:59,573 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 22:20:59,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:20:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 22:20:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 22:20:59,575 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 22:20:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 22:20:59,575 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 22:20:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:20:59,576 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 22:20:59,576 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 22:20:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 22:20:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 22:20:59,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:20:59,576 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 22:20:59,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:20:59,780 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:20:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:20:59,780 INFO L82 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2021-05-02 22:20:59,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:20:59,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659609012] [2021-05-02 22:20:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:20:59,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:20:59,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544259785] [2021-05-02 22:20:59,785 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 22:21:00,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:21:00,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:00,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 22:21:00,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:02,265 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 22:21:02,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:02,621 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 22:21:02,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:02,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659609012] [2021-05-02 22:21:02,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:02,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544259785] [2021-05-02 22:21:02,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544259785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:02,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:02,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 22:21:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985627225] [2021-05-02 22:21:02,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 22:21:02,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:02,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 22:21:02,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=305, Unknown=1, NotChecked=34, Total=380 [2021-05-02 22:21:02,622 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 22:21:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:05,044 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-05-02 22:21:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:21:05,045 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 22:21:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:05,045 INFO L225 Difference]: With dead ends: 98 [2021-05-02 22:21:05,045 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 22:21:05,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2436.0ms TimeCoverageRelationStatistics Valid=56, Invalid=409, Unknown=1, NotChecked=40, Total=506 [2021-05-02 22:21:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 22:21:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 22:21:05,047 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 22:21:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 22:21:05,048 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 22:21:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:05,048 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 22:21:05,048 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 22:21:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 22:21:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 22:21:05,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:05,049 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 22:21:05,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 22:21:05,251 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 10 times [2021-05-02 22:21:05,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:05,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047551821] [2021-05-02 22:21:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:05,258 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:05,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23333900] [2021-05-02 22:21:05,258 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 22:21:05,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:05,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 22:21:05,988 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 22:21:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 22:21:06,041 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 22:21:06,165 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 22:21:06,165 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 22:21:06,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:06,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:21:06 BasicIcfg [2021-05-02 22:21:06,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:21:06,408 INFO L168 Benchmark]: Toolchain (without parser) took 133387.99 ms. Allocated memory was 191.9 MB in the beginning and 262.1 MB in the end (delta: 70.3 MB). Free memory was 157.6 MB in the beginning and 221.6 MB in the end (delta: -63.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:06,408 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 191.9 MB. Free memory was 174.1 MB in the beginning and 174.0 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:21:06,408 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.69 ms. Allocated memory is still 191.9 MB. Free memory was 157.5 MB in the beginning and 147.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:06,409 INFO L168 Benchmark]: Boogie Preprocessor took 53.92 ms. Allocated memory is still 191.9 MB. Free memory was 147.8 MB in the beginning and 175.4 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:06,409 INFO L168 Benchmark]: RCFGBuilder took 246.30 ms. Allocated memory is still 191.9 MB. Free memory was 175.4 MB in the beginning and 161.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:06,409 INFO L168 Benchmark]: IcfgTransformer took 16.67 ms. Allocated memory is still 191.9 MB. Free memory was 161.3 MB in the beginning and 160.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:06,409 INFO L168 Benchmark]: TraceAbstraction took 132860.81 ms. Allocated memory was 191.9 MB in the beginning and 262.1 MB in the end (delta: 70.3 MB). Free memory was 159.7 MB in the beginning and 221.6 MB in the end (delta: -61.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:06,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 191.9 MB. Free memory was 174.1 MB in the beginning and 174.0 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 203.69 ms. Allocated memory is still 191.9 MB. Free memory was 157.5 MB in the beginning and 147.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.92 ms. Allocated memory is still 191.9 MB. Free memory was 147.8 MB in the beginning and 175.4 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 246.30 ms. Allocated memory is still 191.9 MB. Free memory was 175.4 MB in the beginning and 161.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.67 ms. Allocated memory is still 191.9 MB. Free memory was 161.3 MB in the beginning and 160.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 132860.81 ms. Allocated memory was 191.9 MB in the beginning and 262.1 MB in the end (delta: 70.3 MB). Free memory was 159.7 MB in the beginning and 221.6 MB in the end (delta: -61.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=11, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=11, x=0, y=0] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=11, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=11, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=11, x=1, y=1] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=11, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=11, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=11, x=9, y=2] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=11, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=11, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=11, x=36, y=3] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=11, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=11, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=11, x=100, y=4] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=11, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=11, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=11, x=225, y=5] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=5, counter=6, k=11, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=6, counter=6, k=11, x=441, y=6] [L27] EXPR counter++ VAL [\old(counter)=0, c=6, counter=7, counter++=6, k=11, x=441, y=6] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=6, counter=7, k=11, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=7, counter=7, k=11, x=784, y=7] [L27] EXPR counter++ VAL [\old(counter)=0, c=7, counter=8, counter++=7, k=11, x=784, y=7] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=7, counter=8, k=11, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=8, counter=8, k=11, x=1296, y=8] [L27] EXPR counter++ VAL [\old(counter)=0, c=8, counter=9, counter++=8, k=11, x=1296, y=8] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=8, counter=9, k=11, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=9, counter=9, k=11, x=2025, y=9] [L27] EXPR counter++ VAL [\old(counter)=0, c=9, counter=10, counter++=9, k=11, x=2025, y=9] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=9, counter=10, k=11, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=10, counter=10, k=11, x=3025, y=10] [L27] EXPR counter++ VAL [\old(counter)=0, c=10, counter=11, counter++=10, k=11, x=3025, y=10] [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 132780.5ms, OverallIterations: 25, TraceHistogramMax: 11, EmptinessCheckTime: 27.9ms, AutomataDifference: 13125.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 591 SDtfs, 155 SDslu, 3490 SDs, 0 SdLazy, 2455 SolverSat, 76 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 11789.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1159 GetRequests, 883 SyntacticMatches, 8 SemanticMatches, 268 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 108171.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=24, InterpolantAutomatonStates: 279, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 99.8ms AutomataMinimizationTime, 24 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 204.9ms SsaConstructionTime, 3582.4ms SatisfiabilityAnalysisTime, 109822.8ms InterpolantComputationTime, 1201 NumberOfCodeBlocks, 1185 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1085 ConstructedInterpolants, 0 QuantifiedInterpolants, 4230 SizeOfPredicates, 100 NumberOfNonLiveVariables, 4479 ConjunctsInSsa, 545 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 785/2630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...