/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/egcd-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:19:01,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:19:01,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:19:01,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:19:01,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:19:01,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:19:01,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:19:01,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:19:01,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:19:01,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:19:01,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:19:01,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:19:01,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:19:01,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:19:01,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:19:01,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:19:01,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:19:01,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:19:01,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:19:01,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:19:01,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:19:01,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:19:01,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:19:01,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:19:01,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:19:01,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:19:01,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:19:01,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:19:01,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:19:01,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:19:01,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:19:01,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:19:01,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:19:01,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:19:01,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:19:01,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:19:01,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:19:01,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:19:01,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:19:01,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:19:01,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:19:01,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:19:01,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:19:01,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:19:01,529 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:19:01,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:19:01,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:19:01,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:19:01,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:19:01,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:19:01,807 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:19:01,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-05-02 20:19:01,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb2177cc/2477a4c89d634c2ba985e05f72917777/FLAG15abe45ee [2021-05-02 20:19:02,221 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:19:02,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-05-02 20:19:02,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb2177cc/2477a4c89d634c2ba985e05f72917777/FLAG15abe45ee [2021-05-02 20:19:02,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb2177cc/2477a4c89d634c2ba985e05f72917777 [2021-05-02 20:19:02,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:19:02,633 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:19:02,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:19:02,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:19:02,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:19:02,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc3e123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02, skipping insertion in model container [2021-05-02 20:19:02,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:19:02,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:19:02,743 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/egcd-ll_valuebound20.c[489,502] [2021-05-02 20:19:02,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:19:02,758 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:19:02,795 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/egcd-ll_valuebound20.c[489,502] [2021-05-02 20:19:02,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:19:02,817 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:19:02,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02 WrapperNode [2021-05-02 20:19:02,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:19:02,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:19:02,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:19:02,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:19:02,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (1/1) ... [2021-05-02 20:19:02,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:19:02,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:19:02,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:19:02,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:19:02,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (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 20:19:02,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:19:02,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:19:02,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:19:02,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:19:02,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:19:02,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:19:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:19:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:19:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:19:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:19:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:19:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:19:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:19:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:19:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:19:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:19:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:19:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:19:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:19:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:19:03,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:19:03,172 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:19:03,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:19:03 BoogieIcfgContainer [2021-05-02 20:19:03,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:19:03,174 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:19:03,174 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:19:03,174 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:19:03,176 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:19:03" (1/1) ... [2021-05-02 20:19:03,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:19:03 BasicIcfg [2021-05-02 20:19:03,204 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:19:03,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:19:03,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:19:03,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:19:03,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:19:02" (1/4) ... [2021-05-02 20:19:03,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f380256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:19:03, skipping insertion in model container [2021-05-02 20:19:03,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:02" (2/4) ... [2021-05-02 20:19:03,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f380256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:19:03, skipping insertion in model container [2021-05-02 20:19:03,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:19:03" (3/4) ... [2021-05-02 20:19:03,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f380256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:19:03, skipping insertion in model container [2021-05-02 20:19:03,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:19:03" (4/4) ... [2021-05-02 20:19:03,208 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.cJordan [2021-05-02 20:19:03,212 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:19:03,231 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:19:03,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:19:03,272 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:19:03,272 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:19:03,273 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:19:03,273 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:19:03,273 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:19:03,273 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:19:03,273 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:19:03,273 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:19:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:19:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:19:03,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:03,290 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:03,290 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:03,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-02 20:19:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:03,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900977146] [2021-05-02 20:19:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:19:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:19:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:19:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:19:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:19:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:19:03,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:03,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900977146] [2021-05-02 20:19:03,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900977146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:19:03,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:19:03,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:19:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484450725] [2021-05-02 20:19:03,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:19:03,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:19:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:19:03,549 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:19:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:03,637 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:19:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:19:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:19:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:03,644 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:19:03,644 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:19:03,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:19:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:19:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:19:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:19:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:19:03,667 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 20:19:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:03,667 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:19:03,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:19:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:19:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:19:03,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:03,669 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:03,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:19:03,669 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-02 20:19:03,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:03,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396816498] [2021-05-02 20:19:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:03,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:03,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297207824] [2021-05-02 20:19:03,684 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 20:19:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:03,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:19:03,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:03,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:19:03,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:03,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396816498] [2021-05-02 20:19:03,910 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:03,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297207824] [2021-05-02 20:19:03,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297207824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:03,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:03,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:19:03,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436268635] [2021-05-02 20:19:03,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:19:03,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:19:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:19:03,912 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:19:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:04,012 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 20:19:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:19:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 20:19:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:04,014 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:19:04,014 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:19:04,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:19:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:19:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:19:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 20:19:04,022 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 20:19:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:04,022 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 20:19:04,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:19:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 20:19:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:19:04,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:04,023 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:04,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:19:04,233 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-02 20:19:04,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:04,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385485660] [2021-05-02 20:19:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:04,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:04,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625078956] [2021-05-02 20:19:04,245 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 20:19:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:19:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:04,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:19:04,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:04,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385485660] [2021-05-02 20:19:04,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:04,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625078956] [2021-05-02 20:19:04,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625078956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:04,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:04,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369506526] [2021-05-02 20:19:04,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:04,510 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:19:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:04,630 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-02 20:19:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 20:19:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:04,635 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:19:04,635 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:19:04,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:19:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 20:19:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 20:19:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 20:19:04,650 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 20:19:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:04,650 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 20:19:04,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:19:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 20:19:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:19:04,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:04,651 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:04,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:04,852 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-02 20:19:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:04,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134107170] [2021-05-02 20:19:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:04,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:04,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473958011] [2021-05-02 20:19:04,864 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 20:19:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:19:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:04,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:04,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:05,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:05,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:05,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:19:05,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134107170] [2021-05-02 20:19:05,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473958011] [2021-05-02 20:19:05,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473958011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:05,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:05,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:19:05,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709463964] [2021-05-02 20:19:05,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:19:05,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:05,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:19:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:05,034 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:19:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:05,119 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-02 20:19:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:19:05,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 20:19:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:05,120 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:19:05,120 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:19:05,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:19:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 20:19:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:19:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 20:19:05,126 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 20:19:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:05,126 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 20:19:05,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:19:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 20:19:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:19:05,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:05,127 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:05,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:05,341 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-02 20:19:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:05,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628355622] [2021-05-02 20:19:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:05,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:05,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844090982] [2021-05-02 20:19:05,351 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 20:19:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:19:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:19:05,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:05,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628355622] [2021-05-02 20:19:05,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:05,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844090982] [2021-05-02 20:19:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844090982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:19:05,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:19:05,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:19:05,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230549585] [2021-05-02 20:19:05,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:19:05,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:05,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:19:05,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:19:05,487 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:19:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:05,514 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-02 20:19:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:19:05,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 20:19:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:05,515 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:19:05,515 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:19:05,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:19:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:19:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:19:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:19:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 20:19:05,520 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 20:19:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:05,520 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 20:19:05,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:19:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 20:19:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:19:05,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:05,521 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:05,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:05,722 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-02 20:19:05,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:05,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149882733] [2021-05-02 20:19:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:05,731 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:05,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435204026] [2021-05-02 20:19:05,731 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 20:19:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:19:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:05,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:19:05,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149882733] [2021-05-02 20:19:05,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435204026] [2021-05-02 20:19:05,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435204026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:05,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:05,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:19:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5029003] [2021-05-02 20:19:05,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:19:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:19:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:19:05,911 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:19:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:06,006 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-02 20:19:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:19:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 20:19:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:06,010 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:19:06,010 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:19:06,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:19:06,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 20:19:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:19:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:19:06,023 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 20:19:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:06,023 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:19:06,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:19:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:19:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:19:06,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:06,024 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:06,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:19:06,233 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-02 20:19:06,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:06,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738882908] [2021-05-02 20:19:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:06,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:06,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509365957] [2021-05-02 20:19:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:19:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:19:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:19:06,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738882908] [2021-05-02 20:19:06,404 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509365957] [2021-05-02 20:19:06,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509365957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:06,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:06,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:19:06,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779778409] [2021-05-02 20:19:06,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:19:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:06,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:19:06,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:06,408 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:19:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:06,508 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 20:19:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 20:19:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:06,510 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:19:06,510 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:19:06,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:19:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:19:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:19:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 20:19:06,515 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 20:19:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:06,515 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 20:19:06,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:19:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 20:19:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:19:06,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:06,516 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:06,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:06,725 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-02 20:19:06,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:06,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198724956] [2021-05-02 20:19:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:06,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:06,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621021598] [2021-05-02 20:19:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:19:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:06,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:19:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:19:07,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198724956] [2021-05-02 20:19:07,053 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621021598] [2021-05-02 20:19:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621021598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:07,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:07,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:07,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733515723] [2021-05-02 20:19:07,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:07,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:07,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:07,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:07,055 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:19:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:07,303 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:19:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 20:19:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:07,308 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:19:07,308 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:19:07,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:19:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 20:19:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:19:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 20:19:07,324 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 20:19:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:07,325 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 20:19:07,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:19:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 20:19:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:19:07,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:07,326 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:07,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:07,541 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-02 20:19:07,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:07,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934889770] [2021-05-02 20:19:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:07,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:07,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718969578] [2021-05-02 20:19:07,549 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 20:19:07,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:07,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:07,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:19:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:19:07,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:07,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934889770] [2021-05-02 20:19:07,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:07,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718969578] [2021-05-02 20:19:07,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718969578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:07,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:07,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:07,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020937108] [2021-05-02 20:19:07,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:07,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:07,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:07,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:07,827 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:19:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:07,964 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-02 20:19:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 20:19:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:07,967 INFO L225 Difference]: With dead ends: 135 [2021-05-02 20:19:07,967 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:19:07,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:19:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 20:19:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:19:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 20:19:07,974 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 20:19:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:07,974 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 20:19:07,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:19:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 20:19:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:19:07,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:07,976 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:08,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:19:08,189 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-02 20:19:08,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:08,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923709963] [2021-05-02 20:19:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:08,198 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:08,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647885319] [2021-05-02 20:19:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:19:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:19:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:08,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:19:08,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923709963] [2021-05-02 20:19:08,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:08,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647885319] [2021-05-02 20:19:08,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647885319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:08,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:08,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:08,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303142398] [2021-05-02 20:19:08,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:08,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:08,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:08,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:08,400 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:08,591 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-02 20:19:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:08,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:19:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:08,593 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:19:08,593 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:19:08,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:19:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:19:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:19:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 20:19:08,599 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 20:19:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:08,599 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 20:19:08,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 20:19:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:19:08,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:08,600 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:08,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:08,815 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-02 20:19:08,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:08,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080562610] [2021-05-02 20:19:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:08,823 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:08,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387051950] [2021-05-02 20:19:08,823 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 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 20:19:08,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:08,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:19:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:19:09,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080562610] [2021-05-02 20:19:09,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387051950] [2021-05-02 20:19:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387051950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:09,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:09,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512413744] [2021-05-02 20:19:09,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:09,025 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:09,208 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-02 20:19:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:19:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:09,212 INFO L225 Difference]: With dead ends: 164 [2021-05-02 20:19:09,212 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 20:19:09,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 20:19:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 20:19:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 20:19:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 20:19:09,229 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 20:19:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:09,230 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 20:19:09,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 20:19:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:19:09,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:09,235 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:09,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:09,436 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-02 20:19:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:09,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289331812] [2021-05-02 20:19:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:09,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:09,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406865436] [2021-05-02 20:19:09,445 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 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 20:19:09,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:09,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:09,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:19:09,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:09,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289331812] [2021-05-02 20:19:09,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406865436] [2021-05-02 20:19:09,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406865436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:09,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:09,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:09,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893425894] [2021-05-02 20:19:09,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:09,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:09,747 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:09,933 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-02 20:19:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 20:19:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:09,934 INFO L225 Difference]: With dead ends: 188 [2021-05-02 20:19:09,934 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 20:19:09,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 20:19:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 20:19:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:19:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 20:19:09,940 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 20:19:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:09,940 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 20:19:09,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 20:19:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:19:09,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:09,941 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:10,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:19:10,161 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-02 20:19:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:10,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854968708] [2021-05-02 20:19:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:10,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:10,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114331992] [2021-05-02 20:19:10,168 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 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 20:19:10,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:19:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:10,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 20:19:10,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854968708] [2021-05-02 20:19:10,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114331992] [2021-05-02 20:19:10,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114331992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:10,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:10,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936540945] [2021-05-02 20:19:10,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:10,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:10,485 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:19:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:10,672 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-02 20:19:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 20:19:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:10,673 INFO L225 Difference]: With dead ends: 211 [2021-05-02 20:19:10,673 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 20:19:10,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 20:19:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 20:19:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:19:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 20:19:10,679 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 20:19:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:10,679 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 20:19:10,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:19:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 20:19:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:19:10,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:10,680 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:10,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:19:10,893 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-02 20:19:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:10,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477941287] [2021-05-02 20:19:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:10,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:10,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339422594] [2021-05-02 20:19:10,899 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 20:19:10,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:19:10,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:10,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:10,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:19:11,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477941287] [2021-05-02 20:19:11,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339422594] [2021-05-02 20:19:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339422594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:11,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:11,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:19:11,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104509369] [2021-05-02 20:19:11,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:19:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:19:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:11,218 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:11,476 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-02 20:19:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:19:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:19:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:11,477 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:19:11,477 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 20:19:11,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:19:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 20:19:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 20:19:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:19:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 20:19:11,483 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 20:19:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:11,483 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 20:19:11,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 20:19:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:19:11,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:11,484 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:11,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:19:11,697 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-02 20:19:11,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:11,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898892113] [2021-05-02 20:19:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:11,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:11,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341531680] [2021-05-02 20:19:11,703 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 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 20:19:11,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:11,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:19:11,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898892113] [2021-05-02 20:19:11,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341531680] [2021-05-02 20:19:11,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341531680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:11,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:11,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:19:11,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488946972] [2021-05-02 20:19:11,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:19:11,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:19:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:11,957 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:12,242 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2021-05-02 20:19:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:19:12,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:19:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:12,244 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:19:12,244 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 20:19:12,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:19:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 20:19:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 20:19:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 20:19:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 20:19:12,248 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 20:19:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:12,248 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 20:19:12,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 20:19:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:12,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:12,249 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:12,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:12,465 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-02 20:19:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:12,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300794572] [2021-05-02 20:19:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:12,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:12,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740515735] [2021-05-02 20:19:12,471 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 20:19:12,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:19:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:19:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:19:12,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300794572] [2021-05-02 20:19:12,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740515735] [2021-05-02 20:19:12,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740515735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:12,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:12,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:19:12,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191557902] [2021-05-02 20:19:12,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:19:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:19:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:19:12,670 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:19:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:12,796 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2021-05-02 20:19:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 20:19:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:12,797 INFO L225 Difference]: With dead ends: 229 [2021-05-02 20:19:12,798 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 20:19:12,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 20:19:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 20:19:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:19:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 20:19:12,802 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 20:19:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:12,803 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 20:19:12,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:19:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 20:19:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:12,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:12,804 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:13,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:19:13,019 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-02 20:19:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346609945] [2021-05-02 20:19:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:13,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:13,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088483704] [2021-05-02 20:19:13,039 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 20:19:13,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 20:19:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:19:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:13,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:13,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:13,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346609945] [2021-05-02 20:19:13,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088483704] [2021-05-02 20:19:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088483704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:13,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:13,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:13,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632544132] [2021-05-02 20:19:13,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:13,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:13,275 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:13,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:13,520 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2021-05-02 20:19:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:13,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:19:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:13,525 INFO L225 Difference]: With dead ends: 239 [2021-05-02 20:19:13,525 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 20:19:13,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:19:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 20:19:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 20:19:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:19:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 20:19:13,530 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 20:19:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:13,530 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 20:19:13,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 20:19:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:13,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:13,531 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:13,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:19:13,745 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-02 20:19:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:13,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772535715] [2021-05-02 20:19:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:13,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:13,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191144362] [2021-05-02 20:19:13,751 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 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 20:19:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:19:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:13,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:13,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:14,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:14,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772535715] [2021-05-02 20:19:14,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:14,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191144362] [2021-05-02 20:19:14,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191144362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:14,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:14,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:14,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959348232] [2021-05-02 20:19:14,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:14,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:14,004 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:14,240 INFO L93 Difference]: Finished difference Result 249 states and 313 transitions. [2021-05-02 20:19:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 20:19:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:14,242 INFO L225 Difference]: With dead ends: 249 [2021-05-02 20:19:14,242 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 20:19:14,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 20:19:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 20:19:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:19:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:19:14,251 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:19:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:14,252 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:19:14,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:19:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:14,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:14,252 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:14,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:19:14,469 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-02 20:19:14,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:14,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37952117] [2021-05-02 20:19:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:14,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:14,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589501480] [2021-05-02 20:19:14,476 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 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 20:19:14,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:14,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:19:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:14,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:14,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37952117] [2021-05-02 20:19:14,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:14,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589501480] [2021-05-02 20:19:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589501480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:14,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:14,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810298669] [2021-05-02 20:19:14,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:14,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:14,728 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:14,972 INFO L93 Difference]: Finished difference Result 260 states and 329 transitions. [2021-05-02 20:19:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:19:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:14,974 INFO L225 Difference]: With dead ends: 260 [2021-05-02 20:19:14,974 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 20:19:14,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 20:19:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 20:19:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:19:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:19:14,980 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:19:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:14,980 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:19:14,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:19:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:14,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:14,981 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:15,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:15,197 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-02 20:19:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264932051] [2021-05-02 20:19:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:15,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:15,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122234740] [2021-05-02 20:19:15,202 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 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 20:19:15,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:19:15,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:19:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:15,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:19:15,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264932051] [2021-05-02 20:19:15,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122234740] [2021-05-02 20:19:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122234740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:15,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:15,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:15,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580203392] [2021-05-02 20:19:15,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:15,442 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:21,868 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2021-05-02 20:19:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:19:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:21,869 INFO L225 Difference]: With dead ends: 251 [2021-05-02 20:19:21,870 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 20:19:21,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:19:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 20:19:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 20:19:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:19:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 20:19:21,875 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 20:19:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:21,875 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 20:19:21,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 20:19:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:21,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:21,876 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:22,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:22,092 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1009164330, now seen corresponding path program 10 times [2021-05-02 20:19:22,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:22,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241717887] [2021-05-02 20:19:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:22,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:22,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36788602] [2021-05-02 20:19:22,097 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 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 20:19:22,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:19:22,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:19:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:22,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:22,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241717887] [2021-05-02 20:19:22,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:22,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36788602] [2021-05-02 20:19:22,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36788602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:22,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:22,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:22,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417787169] [2021-05-02 20:19:22,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:22,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:22,455 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:22,751 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2021-05-02 20:19:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 20:19:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:22,753 INFO L225 Difference]: With dead ends: 238 [2021-05-02 20:19:22,753 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 20:19:22,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 20:19:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 20:19:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:19:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 20:19:22,760 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 20:19:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:22,761 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 20:19:22,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 20:19:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:22,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:22,763 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:22,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:19:22,969 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-02 20:19:22,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:22,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195007863] [2021-05-02 20:19:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:22,976 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350406283] [2021-05-02 20:19:22,977 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 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 20:19:23,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:19:23,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:19:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:23,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 20:19:23,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:23,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195007863] [2021-05-02 20:19:23,272 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:23,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350406283] [2021-05-02 20:19:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350406283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:23,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:23,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007386494] [2021-05-02 20:19:23,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:23,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:23,274 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:27,436 INFO L93 Difference]: Finished difference Result 266 states and 321 transitions. [2021-05-02 20:19:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 20:19:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:27,437 INFO L225 Difference]: With dead ends: 266 [2021-05-02 20:19:27,437 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 20:19:27,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 20:19:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 20:19:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:19:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 20:19:27,443 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 20:19:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:27,443 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 20:19:27,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 20:19:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:27,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:27,444 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:27,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:19:27,658 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 11 times [2021-05-02 20:19:27,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:27,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760915329] [2021-05-02 20:19:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:27,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769276297] [2021-05-02 20:19:27,665 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 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 20:19:27,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:19:27,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:27,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:27,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:28,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:28,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760915329] [2021-05-02 20:19:28,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:28,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769276297] [2021-05-02 20:19:28,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769276297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:28,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:28,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:28,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018457047] [2021-05-02 20:19:28,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:28,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:28,062 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:28,320 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2021-05-02 20:19:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:28,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:28,322 INFO L225 Difference]: With dead ends: 280 [2021-05-02 20:19:28,322 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 20:19:28,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 20:19:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 20:19:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:19:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 20:19:28,328 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 20:19:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:28,328 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 20:19:28,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 20:19:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:28,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:28,330 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:28,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:28,546 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 12 times [2021-05-02 20:19:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:28,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78731469] [2021-05-02 20:19:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:28,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:28,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008521459] [2021-05-02 20:19:28,559 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 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 20:19:28,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:19:28,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:19:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:28,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:19:28,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:28,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78731469] [2021-05-02 20:19:28,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:28,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008521459] [2021-05-02 20:19:28,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008521459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:28,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:28,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:28,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208517685] [2021-05-02 20:19:28,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:28,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:28,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:28,802 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:33,113 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2021-05-02 20:19:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 20:19:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:33,115 INFO L225 Difference]: With dead ends: 322 [2021-05-02 20:19:33,115 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:19:33,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:19:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 20:19:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:19:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 20:19:33,122 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 20:19:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:33,123 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 20:19:33,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 20:19:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:33,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:33,124 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:33,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:19:33,331 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 13 times [2021-05-02 20:19:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:33,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115121213] [2021-05-02 20:19:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:33,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:33,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275391344] [2021-05-02 20:19:33,337 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 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 20:19:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:19:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:33,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:33,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115121213] [2021-05-02 20:19:33,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:33,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275391344] [2021-05-02 20:19:33,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275391344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:33,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:33,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:33,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042575042] [2021-05-02 20:19:33,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:33,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:33,734 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:34,031 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2021-05-02 20:19:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:34,032 INFO L225 Difference]: With dead ends: 302 [2021-05-02 20:19:34,032 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 20:19:34,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 20:19:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 20:19:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:19:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 20:19:34,038 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 20:19:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:34,039 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 20:19:34,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 20:19:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:19:34,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:34,040 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:34,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:34,255 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 14 times [2021-05-02 20:19:34,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:34,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303698360] [2021-05-02 20:19:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:34,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:34,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649240190] [2021-05-02 20:19:34,264 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:19:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:34,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 20:19:34,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:34,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303698360] [2021-05-02 20:19:34,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:34,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649240190] [2021-05-02 20:19:34,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649240190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:34,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:34,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437758849] [2021-05-02 20:19:34,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:34,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:34,604 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:19:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:34,836 INFO L93 Difference]: Finished difference Result 326 states and 397 transitions. [2021-05-02 20:19:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:34,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:19:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:34,837 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:19:34,838 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:19:34,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:19:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 20:19:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:19:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 20:19:34,843 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 20:19:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:34,843 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 20:19:34,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:19:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 20:19:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:19:34,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:34,844 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:35,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:19:35,057 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 15 times [2021-05-02 20:19:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:35,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140039530] [2021-05-02 20:19:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:35,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:35,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120741542] [2021-05-02 20:19:35,066 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:35,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:35,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:19:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:42,015 WARN L205 SmtUtils]: Spent 4.54 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:19:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:19:42,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140039530] [2021-05-02 20:19:42,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120741542] [2021-05-02 20:19:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120741542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:42,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:42,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973239264] [2021-05-02 20:19:42,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:19:42,072 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:12,901 WARN L205 SmtUtils]: Spent 16.63 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 20:20:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:28,051 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-02 20:20:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:20:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 20:20:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:28,066 INFO L225 Difference]: With dead ends: 357 [2021-05-02 20:20:28,066 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 20:20:28,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 23293.3ms TimeCoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-05-02 20:20:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 20:20:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 20:20:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 20:20:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 20:20:28,073 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 20:20:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:28,073 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 20:20:28,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 20:20:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:28,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:28,074 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:28,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:20:28,285 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2019996691, now seen corresponding path program 16 times [2021-05-02 20:20:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237905527] [2021-05-02 20:20:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:28,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:28,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078491320] [2021-05-02 20:20:28,293 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:28,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:20:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 20:20:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:28,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 51 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:20:28,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:28,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237905527] [2021-05-02 20:20:28,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:28,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078491320] [2021-05-02 20:20:28,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078491320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:28,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:28,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:20:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351401400] [2021-05-02 20:20:28,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:20:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:28,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:20:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:20:28,877 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:29,453 INFO L93 Difference]: Finished difference Result 381 states and 473 transitions. [2021-05-02 20:20:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:20:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:20:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:29,455 INFO L225 Difference]: With dead ends: 381 [2021-05-02 20:20:29,455 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 20:20:29,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:20:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 20:20:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-05-02 20:20:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 221 states have internal predecessors, (246), 95 states have call successors, (95), 46 states have call predecessors, (95), 45 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 20:20:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 434 transitions. [2021-05-02 20:20:29,462 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 434 transitions. Word has length 97 [2021-05-02 20:20:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:29,462 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 434 transitions. [2021-05-02 20:20:29,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 434 transitions. [2021-05-02 20:20:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:29,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:29,463 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:29,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:20:29,677 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1249478606, now seen corresponding path program 4 times [2021-05-02 20:20:29,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:29,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721683761] [2021-05-02 20:20:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:29,687 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:29,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264288749] [2021-05-02 20:20:29,688 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:29,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:20:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 20:20:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 61 proven. 72 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:20:30,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721683761] [2021-05-02 20:20:30,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264288749] [2021-05-02 20:20:30,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264288749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:30,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:30,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:20:30,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627886718] [2021-05-02 20:20:30,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:20:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:30,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:20:30,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:30,256 INFO L87 Difference]: Start difference. First operand 355 states and 434 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:30,680 INFO L93 Difference]: Finished difference Result 390 states and 493 transitions. [2021-05-02 20:20:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:20:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:30,682 INFO L225 Difference]: With dead ends: 390 [2021-05-02 20:20:30,682 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 20:20:30,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:20:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 20:20:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-05-02 20:20:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 229 states have (on average 1.1572052401746724) internal successors, (265), 236 states have internal predecessors, (265), 107 states have call successors, (107), 47 states have call predecessors, (107), 46 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:20:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2021-05-02 20:20:30,690 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 97 [2021-05-02 20:20:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:30,690 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2021-05-02 20:20:30,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2021-05-02 20:20:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:20:30,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:30,691 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:30,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:20:30,897 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353058, now seen corresponding path program 17 times [2021-05-02 20:20:30,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:30,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808815051] [2021-05-02 20:20:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:30,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:30,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520896785] [2021-05-02 20:20:30,903 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:32,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 20:20:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:20:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:32,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 20:20:32,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808815051] [2021-05-02 20:20:32,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520896785] [2021-05-02 20:20:32,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520896785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:32,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:32,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:20:32,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712685089] [2021-05-02 20:20:32,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:20:32,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:32,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:20:32,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:20:32,741 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:20:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:32,942 INFO L93 Difference]: Finished difference Result 397 states and 493 transitions. [2021-05-02 20:20:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:20:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2021-05-02 20:20:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:32,944 INFO L225 Difference]: With dead ends: 397 [2021-05-02 20:20:32,944 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 20:20:32,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 20:20:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-05-02 20:20:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 236 states have (on average 1.152542372881356) internal successors, (272), 244 states have internal predecessors, (272), 108 states have call successors, (108), 49 states have call predecessors, (108), 48 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 20:20:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 486 transitions. [2021-05-02 20:20:32,951 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 486 transitions. Word has length 105 [2021-05-02 20:20:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:32,951 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 486 transitions. [2021-05-02 20:20:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:20:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 486 transitions. [2021-05-02 20:20:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:20:32,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:32,952 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:33,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 20:20:33,160 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1609273058, now seen corresponding path program 18 times [2021-05-02 20:20:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:33,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130190186] [2021-05-02 20:20:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:33,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:33,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298289984] [2021-05-02 20:20:33,166 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:34,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 20:20:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:20:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:34,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-05-02 20:20:34,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130190186] [2021-05-02 20:20:34,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298289984] [2021-05-02 20:20:34,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298289984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:34,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:34,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:34,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387627499] [2021-05-02 20:20:34,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:34,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:34,353 INFO L87 Difference]: Start difference. First operand 393 states and 486 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:20:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:36,477 INFO L93 Difference]: Finished difference Result 409 states and 498 transitions. [2021-05-02 20:20:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:20:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 105 [2021-05-02 20:20:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:36,479 INFO L225 Difference]: With dead ends: 409 [2021-05-02 20:20:36,479 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 20:20:36,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 20:20:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 402. [2021-05-02 20:20:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 245 states have (on average 1.146938775510204) internal successors, (281), 252 states have internal predecessors, (281), 105 states have call successors, (105), 52 states have call predecessors, (105), 51 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 20:20:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 489 transitions. [2021-05-02 20:20:36,486 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 489 transitions. Word has length 105 [2021-05-02 20:20:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:36,486 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 489 transitions. [2021-05-02 20:20:36,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:20:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 489 transitions. [2021-05-02 20:20:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:20:36,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:36,487 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:36,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:36,693 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1190597354, now seen corresponding path program 19 times [2021-05-02 20:20:36,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:36,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075792967] [2021-05-02 20:20:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:36,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:36,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201278955] [2021-05-02 20:20:36,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:20:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:36,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 20:20:37,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:37,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075792967] [2021-05-02 20:20:37,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:37,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201278955] [2021-05-02 20:20:37,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201278955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:37,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:37,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:20:37,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669780046] [2021-05-02 20:20:37,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:20:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:20:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:37,295 INFO L87 Difference]: Start difference. First operand 402 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:37,720 INFO L93 Difference]: Finished difference Result 432 states and 526 transitions. [2021-05-02 20:20:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:20:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 20:20:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:37,722 INFO L225 Difference]: With dead ends: 432 [2021-05-02 20:20:37,723 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 20:20:37,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 20:20:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2021-05-02 20:20:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 262 states have (on average 1.1488549618320612) internal successors, (301), 268 states have internal predecessors, (301), 110 states have call successors, (110), 56 states have call predecessors, (110), 55 states have return successors, (108), 103 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 20:20:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 519 transitions. [2021-05-02 20:20:37,730 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 519 transitions. Word has length 110 [2021-05-02 20:20:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:37,730 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 519 transitions. [2021-05-02 20:20:37,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 519 transitions. [2021-05-02 20:20:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:20:37,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:37,731 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:37,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 20:20:37,945 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1826532182, now seen corresponding path program 20 times [2021-05-02 20:20:37,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:37,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203379604] [2021-05-02 20:20:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:37,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:37,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154026383] [2021-05-02 20:20:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:38,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:20:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:38,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 20:20:38,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203379604] [2021-05-02 20:20:38,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154026383] [2021-05-02 20:20:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154026383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:38,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:38,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:20:38,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798138656] [2021-05-02 20:20:38,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:20:38,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:20:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:20:38,492 INFO L87 Difference]: Start difference. First operand 428 states and 519 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:39,049 INFO L93 Difference]: Finished difference Result 468 states and 569 transitions. [2021-05-02 20:20:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 20:20:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:39,051 INFO L225 Difference]: With dead ends: 468 [2021-05-02 20:20:39,052 INFO L226 Difference]: Without dead ends: 468 [2021-05-02 20:20:39,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:20:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-02 20:20:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-05-02 20:20:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 279 states have (on average 1.146953405017921) internal successors, (320), 284 states have internal predecessors, (320), 115 states have call successors, (115), 60 states have call predecessors, (115), 59 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 20:20:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 548 transitions. [2021-05-02 20:20:39,061 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 548 transitions. Word has length 110 [2021-05-02 20:20:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:39,062 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 548 transitions. [2021-05-02 20:20:39,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 548 transitions. [2021-05-02 20:20:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:20:39,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:39,063 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:39,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:20:39,270 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:39,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1133430485, now seen corresponding path program 21 times [2021-05-02 20:20:39,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:39,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048292361] [2021-05-02 20:20:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:39,276 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:39,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144118181] [2021-05-02 20:20:39,276 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true