/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/cohendiv-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:40:30,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:40:30,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:40:30,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:40:30,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:40:30,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:40:30,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:40:30,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:40:30,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:40:30,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:40:30,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:40:30,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:40:30,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:40:30,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:40:30,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:40:30,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:40:30,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:40:30,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:40:30,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:40:30,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:40:30,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:40:30,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:40:30,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:40:30,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:40:30,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:40:30,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:40:30,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:40:30,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:40:30,723 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:40:30,733 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:40:30,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:40:30,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:40:30,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:40:30,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:40:30,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:40:30,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:40:30,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:40:30,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:40:30,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:40:30,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:40:30,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:40:30,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:40:30,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:40:30,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:40:30,737 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:40:30,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:40:30,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:40:31,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:40:31,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:40:31,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:40:31,010 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:40:31,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2021-05-02 19:40:31,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5488c5920/4d342d1d9676443d8cc84b43e3f1a6f0/FLAGf7225aa9c [2021-05-02 19:40:31,533 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:40:31,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2021-05-02 19:40:31,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5488c5920/4d342d1d9676443d8cc84b43e3f1a6f0/FLAGf7225aa9c [2021-05-02 19:40:31,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5488c5920/4d342d1d9676443d8cc84b43e3f1a6f0 [2021-05-02 19:40:31,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:40:31,940 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:40:31,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:31,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:40:31,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:40:31,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:31" (1/1) ... [2021-05-02 19:40:31,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc2bfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:31, skipping insertion in model container [2021-05-02 19:40:31,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:31" (1/1) ... [2021-05-02 19:40:31,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:40:31,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:40:32,108 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/cohendiv-ll_unwindbound10.c[576,589] [2021-05-02 19:40:32,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:32,128 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:40:32,149 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/cohendiv-ll_unwindbound10.c[576,589] [2021-05-02 19:40:32,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:32,199 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:40:32,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32 WrapperNode [2021-05-02 19:40:32,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:32,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:40:32,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:40:32,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:40:32,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:40:32,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:40:32,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:40:32,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:40:32,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (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 19:40:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:40:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:40:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:40:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:40:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:40:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:40:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:40:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:40:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:40:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:40:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:40:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:40:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:40:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:40:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:40:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:40:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:40:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:40:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:40:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:40:32,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:40:32,644 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:40:32,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:32 BoogieIcfgContainer [2021-05-02 19:40:32,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:40:32,646 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:40:32,646 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:40:32,647 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:40:32,649 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:32" (1/1) ... [2021-05-02 19:40:32,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:32 BasicIcfg [2021-05-02 19:40:32,664 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:40:32,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:40:32,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:40:32,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:40:32,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:40:31" (1/4) ... [2021-05-02 19:40:32,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:32, skipping insertion in model container [2021-05-02 19:40:32,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:32" (2/4) ... [2021-05-02 19:40:32,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:32, skipping insertion in model container [2021-05-02 19:40:32,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:32" (3/4) ... [2021-05-02 19:40:32,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:40:32, skipping insertion in model container [2021-05-02 19:40:32,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:32" (4/4) ... [2021-05-02 19:40:32,671 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound10.cJordan [2021-05-02 19:40:32,675 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:40:32,678 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:40:32,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:40:32,708 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:40:32,709 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:40:32,709 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:40:32,709 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:40:32,709 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:40:32,709 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:40:32,709 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:40:32,709 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:40:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:40:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:40:32,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:32,727 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:32,727 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-02 19:40:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:32,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321880638] [2021-05-02 19:40:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:32,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:40:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:40:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:32,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:32,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321880638] [2021-05-02 19:40:32,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321880638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:32,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:32,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:40:32,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809041157] [2021-05-02 19:40:32,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:40:32,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:40:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:32,948 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:33,054 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:40:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:40:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:40:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:33,061 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:40:33,061 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:40:33,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:40:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:40:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 19:40:33,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 19:40:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:33,120 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 19:40:33,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 19:40:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:40:33,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:33,121 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:33,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:40:33,122 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-02 19:40:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:33,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553754926] [2021-05-02 19:40:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:33,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:33,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481554946] [2021-05-02 19:40:33,147 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 19:40:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:40:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:33,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:33,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:33,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553754926] [2021-05-02 19:40:33,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:33,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481554946] [2021-05-02 19:40:33,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481554946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:33,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:33,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:40:33,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897525431] [2021-05-02 19:40:33,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:40:33,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:40:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:40:33,329 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:40:33,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:33,341 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:40:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:40:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 19:40:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:33,342 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:40:33,342 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:40:33,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:40:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:40:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:40:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:40:33,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 19:40:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:33,349 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:40:33,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:40:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:40:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:40:33,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:33,349 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:33,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:40:33,568 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-02 19:40:33,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:33,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764303025] [2021-05-02 19:40:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:33,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:33,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983075795] [2021-05-02 19:40:33,587 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 19:40:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:33,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:33,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764303025] [2021-05-02 19:40:33,720 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:33,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983075795] [2021-05-02 19:40:33,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983075795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:33,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:33,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407249444] [2021-05-02 19:40:33,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:33,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:33,722 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:33,801 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:40:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 19:40:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:33,803 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:40:33,803 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:40:33,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:40:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:40:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:40:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:40:33,811 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 19:40:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:33,811 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:40:33,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:40:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:40:33,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:33,813 INFO L523 BasicCegarLoop]: trace histogram [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 19:40:34,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:34,032 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:34,032 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-02 19:40:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:34,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587524919] [2021-05-02 19:40:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:34,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:34,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325905800] [2021-05-02 19:40:34,050 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 19:40:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:34,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:34,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:34,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587524919] [2021-05-02 19:40:34,272 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:34,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325905800] [2021-05-02 19:40:34,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325905800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:34,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:34,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558743203] [2021-05-02 19:40:34,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:34,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:34,274 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:34,388 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 19:40:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:34,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:40:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:34,390 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:40:34,390 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:40:34,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:40:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:40:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:40:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 19:40:34,399 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 19:40:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:34,400 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 19:40:34,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 19:40:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:40:34,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:34,401 INFO L523 BasicCegarLoop]: trace histogram [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 19:40:34,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:34,624 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-02 19:40:34,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:34,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370323488] [2021-05-02 19:40:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:34,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735540995] [2021-05-02 19:40:34,660 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 19:40:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:34,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:34,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:34,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370323488] [2021-05-02 19:40:34,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:34,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735540995] [2021-05-02 19:40:34,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735540995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:34,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:34,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:34,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143862269] [2021-05-02 19:40:34,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:34,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:34,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:34,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:34,903 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:40:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:35,032 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-02 19:40:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:35,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 19:40:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:35,036 INFO L225 Difference]: With dead ends: 81 [2021-05-02 19:40:35,036 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:40:35,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:40:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 19:40:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 19:40:35,063 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 19:40:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:35,063 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 19:40:35,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:40:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 19:40:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:40:35,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:35,064 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-05-02 19:40:35,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:35,286 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-02 19:40:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:35,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749306185] [2021-05-02 19:40:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:35,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:35,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319291687] [2021-05-02 19:40:35,310 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 19:40:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:35,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:40:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:35,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:35,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:35,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749306185] [2021-05-02 19:40:35,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:35,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319291687] [2021-05-02 19:40:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319291687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:35,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:35,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:40:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205800485] [2021-05-02 19:40:35,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:40:35,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:40:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:40:35,465 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:35,492 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-02 19:40:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:40:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 19:40:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:35,495 INFO L225 Difference]: With dead ends: 78 [2021-05-02 19:40:35,495 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:40:35,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:40:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:40:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:40:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 19:40:35,502 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 19:40:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:35,502 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 19:40:35,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 19:40:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:40:35,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:35,503 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-02 19:40:35,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:40:35,717 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-02 19:40:35,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:35,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802973485] [2021-05-02 19:40:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:35,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:35,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123389393] [2021-05-02 19:40:35,738 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 19:40:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:40:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:35,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:40:35,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:35,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802973485] [2021-05-02 19:40:35,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:35,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123389393] [2021-05-02 19:40:35,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123389393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:35,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:35,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810293599] [2021-05-02 19:40:35,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:35,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:35,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:35,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:35,920 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:40:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:36,018 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-02 19:40:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 19:40:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:36,020 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:40:36,021 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:40:36,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:40:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:40:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 19:40:36,040 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 19:40:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:36,041 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 19:40:36,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:40:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 19:40:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 19:40:36,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:36,044 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2021-05-02 19:40:36,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:36,249 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:36,250 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-02 19:40:36,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:36,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722547297] [2021-05-02 19:40:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:36,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:36,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428648338] [2021-05-02 19:40:36,269 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 19:40:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:40:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:40:36,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722547297] [2021-05-02 19:40:36,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:36,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428648338] [2021-05-02 19:40:36,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428648338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:36,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:36,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:40:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319811872] [2021-05-02 19:40:36,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:40:36,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:40:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:36,541 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:40:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:36,696 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-02 19:40:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:40:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 19:40:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:36,697 INFO L225 Difference]: With dead ends: 86 [2021-05-02 19:40:36,697 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 19:40:36,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:40:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 19:40:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 19:40:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 19:40:36,703 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 19:40:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:36,703 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 19:40:36,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:40:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 19:40:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:40:36,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:36,705 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:36,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:36,921 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-02 19:40:36,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:36,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121607589] [2021-05-02 19:40:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:36,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:36,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268758729] [2021-05-02 19:40:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:40:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:37,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:40:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121607589] [2021-05-02 19:40:37,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268758729] [2021-05-02 19:40:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268758729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:37,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:37,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:40:37,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875457474] [2021-05-02 19:40:37,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:40:37,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:40:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:37,110 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:40:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:37,162 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-02 19:40:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:37,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 19:40:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:37,164 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:40:37,164 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:40:37,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:40:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 19:40:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 19:40:37,169 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 19:40:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:37,170 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 19:40:37,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:40:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 19:40:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:40:37,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:37,171 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-02 19:40:37,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:40:37,385 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-02 19:40:37,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:37,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122633009] [2021-05-02 19:40:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:37,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:37,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155552106] [2021-05-02 19:40:37,394 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 19:40:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:40:37,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:37,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:40:37,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122633009] [2021-05-02 19:40:37,786 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155552106] [2021-05-02 19:40:37,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155552106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:37,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:37,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:40:37,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973248880] [2021-05-02 19:40:37,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:40:37,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:37,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:40:37,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:37,788 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:37,969 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 19:40:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:40:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 19:40:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:37,970 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:40:37,970 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 19:40:37,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:40:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 19:40:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 19:40:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 19:40:37,976 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 19:40:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:37,976 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 19:40:37,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 19:40:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:40:37,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:37,977 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:38,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:38,200 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-02 19:40:38,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:38,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373949509] [2021-05-02 19:40:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:38,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:38,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578692775] [2021-05-02 19:40:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:40:38,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:38,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:40:38,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:38,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373949509] [2021-05-02 19:40:38,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:38,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578692775] [2021-05-02 19:40:38,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578692775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:38,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:38,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:40:38,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551192908] [2021-05-02 19:40:38,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:40:38,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:40:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:38,418 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:38,477 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-05-02 19:40:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 19:40:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:38,478 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:40:38,478 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:40:38,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:40:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 19:40:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 19:40:38,483 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 19:40:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:38,483 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 19:40:38,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 19:40:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:40:38,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:38,484 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:38,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:38,685 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-02 19:40:38,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:38,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177154491] [2021-05-02 19:40:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:38,694 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:38,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122177898] [2021-05-02 19:40:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:40:38,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:38,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:40:38,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:38,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177154491] [2021-05-02 19:40:38,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:38,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122177898] [2021-05-02 19:40:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122177898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:38,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:38,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:40:38,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213101740] [2021-05-02 19:40:38,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:40:38,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:40:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:38,911 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:40:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:38,977 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-05-02 19:40:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 19:40:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:38,979 INFO L225 Difference]: With dead ends: 128 [2021-05-02 19:40:38,979 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 19:40:38,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 19:40:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 19:40:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:40:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 19:40:39,008 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 19:40:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:39,010 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 19:40:39,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:40:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 19:40:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 19:40:39,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:39,013 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2021-05-02 19:40:39,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:40:39,214 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-02 19:40:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:39,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802976128] [2021-05-02 19:40:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:39,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:39,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676008961] [2021-05-02 19:40:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:40:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:39,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 19:40:39,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:39,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802976128] [2021-05-02 19:40:39,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:39,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676008961] [2021-05-02 19:40:39,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676008961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:39,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:39,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:40:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481393017] [2021-05-02 19:40:39,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:40:39,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:40:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:40:39,985 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:40:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:40,384 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2021-05-02 19:40:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:40:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 19:40:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:40,386 INFO L225 Difference]: With dead ends: 156 [2021-05-02 19:40:40,386 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 19:40:40,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:40:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 19:40:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 19:40:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:40:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 19:40:40,393 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 19:40:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:40,394 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 19:40:40,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:40:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 19:40:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 19:40:40,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:40,396 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2021-05-02 19:40:40,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:40:40,606 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-02 19:40:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:40,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542195845] [2021-05-02 19:40:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:40,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:40,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036279992] [2021-05-02 19:40:40,621 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 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 19:40:40,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:40,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:40,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:40:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:40,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 19:40:40,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542195845] [2021-05-02 19:40:40,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036279992] [2021-05-02 19:40:40,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036279992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:40,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:40,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:40:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706731727] [2021-05-02 19:40:40,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:40:40,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:40:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:40,851 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:40:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:40,947 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 19:40:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 19:40:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:40,949 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:40:40,949 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 19:40:40,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:40:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 19:40:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 19:40:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:40:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 19:40:40,958 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 19:40:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:40,959 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 19:40:40,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:40:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 19:40:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 19:40:40,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:40,961 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2021-05-02 19:40:41,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:40:41,183 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-02 19:40:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178679691] [2021-05-02 19:40:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:41,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:41,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626694982] [2021-05-02 19:40:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:40:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:41,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 19:40:41,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:41,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178679691] [2021-05-02 19:40:41,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:41,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626694982] [2021-05-02 19:40:41,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626694982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:41,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:41,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:41,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894920842] [2021-05-02 19:40:41,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:41,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:41,417 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:40:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:41,540 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-02 19:40:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:40:41,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 19:40:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:41,542 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:40:41,542 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:40:41,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:40:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 19:40:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:40:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 19:40:41,557 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 19:40:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:41,557 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 19:40:41,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:40:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 19:40:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 19:40:41,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:41,560 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:41,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:41,781 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-02 19:40:41,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:41,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713658841] [2021-05-02 19:40:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:41,789 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:41,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691575398] [2021-05-02 19:40:41,789 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 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 19:40:41,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:40:41,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:41,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 19:40:42,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:42,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713658841] [2021-05-02 19:40:42,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:42,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691575398] [2021-05-02 19:40:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691575398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:42,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:42,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:42,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820014108] [2021-05-02 19:40:42,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:42,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:42,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:42,065 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:40:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:42,174 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2021-05-02 19:40:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 19:40:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:42,176 INFO L225 Difference]: With dead ends: 181 [2021-05-02 19:40:42,176 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 19:40:42,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 19:40:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 19:40:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:40:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 19:40:42,185 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 19:40:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:42,185 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 19:40:42,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:40:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 19:40:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:40:42,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:42,187 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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 19:40:42,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:40:42,397 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-02 19:40:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:42,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046155779] [2021-05-02 19:40:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:42,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702222389] [2021-05-02 19:40:42,405 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 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 19:40:42,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:42,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:40:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:42,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 19:40:42,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046155779] [2021-05-02 19:40:42,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702222389] [2021-05-02 19:40:42,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702222389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:42,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:42,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:40:42,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087831775] [2021-05-02 19:40:42,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:40:42,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:42,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:40:42,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:40:42,849 INFO L87 Difference]: Start difference. First operand 181 states and 212 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:40:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:43,203 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2021-05-02 19:40:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:40:43,204 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 19:40:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:43,205 INFO L225 Difference]: With dead ends: 214 [2021-05-02 19:40:43,205 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 19:40:43,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:40:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 19:40:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 19:40:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 19:40:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 19:40:43,212 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 19:40:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:43,213 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 19:40:43,213 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:40:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 19:40:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 19:40:43,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:43,214 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 19:40:43,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:40:43,433 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-02 19:40:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:43,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789304440] [2021-05-02 19:40:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:43,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:43,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986987962] [2021-05-02 19:40:43,440 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 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 19:40:43,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 19:40:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:43,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:40:43,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:43,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 19:40:43,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:43,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789304440] [2021-05-02 19:40:43,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:43,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986987962] [2021-05-02 19:40:43,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986987962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:43,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:43,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:40:43,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477113603] [2021-05-02 19:40:43,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:40:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:40:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:40:43,848 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:40:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:50,505 INFO L93 Difference]: Finished difference Result 252 states and 298 transitions. [2021-05-02 19:40:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:40:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 19:40:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:50,506 INFO L225 Difference]: With dead ends: 252 [2021-05-02 19:40:50,507 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 19:40:50,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:40:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 19:40:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 19:40:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 19:40:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 19:40:50,514 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 19:40:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:50,514 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 19:40:50,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:40:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 19:40:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:40:50,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:50,516 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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 19:40:50,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:40:50,738 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:50,738 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-02 19:40:50,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:50,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32487668] [2021-05-02 19:40:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:50,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:50,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592739856] [2021-05-02 19:40:50,754 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 19:40:50,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:50,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:50,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:40:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:50,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:50,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 19:40:51,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:51,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32487668] [2021-05-02 19:40:51,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:51,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592739856] [2021-05-02 19:40:51,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592739856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:51,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:51,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:40:51,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542699570] [2021-05-02 19:40:51,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:40:51,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:40:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:51,086 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:40:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:51,241 INFO L93 Difference]: Finished difference Result 275 states and 331 transitions. [2021-05-02 19:40:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 19:40:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:51,245 INFO L225 Difference]: With dead ends: 275 [2021-05-02 19:40:51,245 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 19:40:51,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 19:40:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 19:40:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:40:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 19:40:51,253 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 19:40:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:51,254 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 19:40:51,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:40:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 19:40:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:40:51,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:51,255 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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 19:40:51,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:51,464 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1109340483, now seen corresponding path program 3 times [2021-05-02 19:40:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:51,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62679480] [2021-05-02 19:40:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:51,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:51,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051504088] [2021-05-02 19:40:51,471 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 19:40:51,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:40:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:40:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:51,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 19:40:51,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62679480] [2021-05-02 19:40:51,799 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051504088] [2021-05-02 19:40:51,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051504088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:51,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:51,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:51,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976988211] [2021-05-02 19:40:51,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:51,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:51,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:51,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:51,801 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:40:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:54,073 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2021-05-02 19:40:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:40:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 19:40:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:54,075 INFO L225 Difference]: With dead ends: 236 [2021-05-02 19:40:54,075 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 19:40:54,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:40:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 19:40:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 19:40:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 19:40:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 19:40:54,081 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 19:40:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:54,082 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 19:40:54,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:40:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 19:40:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 19:40:54,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:54,083 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 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, 1, 1, 1, 1, 1] [2021-05-02 19:40:54,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:54,284 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-02 19:40:54,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:54,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131200329] [2021-05-02 19:40:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:54,291 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:54,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088175854] [2021-05-02 19:40:54,291 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 19:40:54,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:40:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:40:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:54,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:40:54,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131200329] [2021-05-02 19:40:54,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088175854] [2021-05-02 19:40:54,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088175854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:54,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:54,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:40:54,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268914283] [2021-05-02 19:40:54,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:40:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:40:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:40:54,918 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:40:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:55,422 INFO L93 Difference]: Finished difference Result 287 states and 345 transitions. [2021-05-02 19:40:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:40:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 19:40:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:55,424 INFO L225 Difference]: With dead ends: 287 [2021-05-02 19:40:55,424 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 19:40:55,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:40:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 19:40:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 19:40:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 19:40:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 19:40:55,431 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 19:40:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:55,432 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 19:40:55,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:40:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 19:40:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 19:40:55,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:55,433 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 19:40:55,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:40:55,658 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1409290752, now seen corresponding path program 3 times [2021-05-02 19:40:55,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:55,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230121784] [2021-05-02 19:40:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:55,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:55,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690458124] [2021-05-02 19:40:55,673 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 19:40:55,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:40:55,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:40:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:58,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:58,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 19:40:58,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:58,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230121784] [2021-05-02 19:40:58,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:58,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690458124] [2021-05-02 19:40:58,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690458124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:58,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:58,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:58,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051915725] [2021-05-02 19:40:58,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:58,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 19:40:58,260 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:41:04,476 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 19:41:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:32,834 INFO L93 Difference]: Finished difference Result 309 states and 381 transitions. [2021-05-02 19:41:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:41:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 19:41:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:32,837 INFO L225 Difference]: With dead ends: 309 [2021-05-02 19:41:32,837 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 19:41:32,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8520.1ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 19:41:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 19:41:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 19:41:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:41:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 19:41:32,867 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 19:41:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:32,867 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 19:41:32,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:41:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 19:41:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 19:41:32,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:32,869 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 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 19:41:33,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 19:41:33,077 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1769981228, now seen corresponding path program 4 times [2021-05-02 19:41:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:33,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905290153] [2021-05-02 19:41:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:33,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:33,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347028463] [2021-05-02 19:41:33,084 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 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 19:41:33,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:41:33,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 19:41:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:33,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 19:41:33,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905290153] [2021-05-02 19:41:33,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347028463] [2021-05-02 19:41:33,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347028463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:33,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:33,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:41:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289965809] [2021-05-02 19:41:33,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:41:33,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:41:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:41:33,841 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:41:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:34,496 INFO L93 Difference]: Finished difference Result 288 states and 334 transitions. [2021-05-02 19:41:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:41:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 19:41:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:34,498 INFO L225 Difference]: With dead ends: 288 [2021-05-02 19:41:34,499 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 19:41:34,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:41:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 19:41:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 19:41:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 19:41:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 19:41:34,506 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 19:41:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:34,506 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 19:41:34,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:41:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 19:41:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 19:41:34,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:34,508 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:34,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:34,728 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash -493605665, now seen corresponding path program 5 times [2021-05-02 19:41:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:34,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027447436] [2021-05-02 19:41:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:34,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:34,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108115841] [2021-05-02 19:41:34,735 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 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 19:41:34,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 19:41:34,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:34,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:41:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:34,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:34,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:34,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:34,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 19:41:35,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:35,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027447436] [2021-05-02 19:41:35,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:35,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108115841] [2021-05-02 19:41:35,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108115841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:35,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:35,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:41:35,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426320792] [2021-05-02 19:41:35,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:41:35,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:41:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:41:35,032 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:41:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:35,079 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2021-05-02 19:41:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:41:35,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 19:41:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:35,081 INFO L225 Difference]: With dead ends: 268 [2021-05-02 19:41:35,081 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 19:41:35,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:41:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 19:41:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 19:41:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 19:41:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 19:41:35,087 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 19:41:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:35,087 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 19:41:35,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:41:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 19:41:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 19:41:35,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:35,089 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 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 19:41:35,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:41:35,311 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -604387605, now seen corresponding path program 6 times [2021-05-02 19:41:35,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:35,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241722093] [2021-05-02 19:41:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:35,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:35,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204790627] [2021-05-02 19:41:35,318 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 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 19:41:35,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 19:41:35,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:35,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:41:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:35,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 51 proven. 983 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-02 19:41:35,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:35,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241722093] [2021-05-02 19:41:35,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:35,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204790627] [2021-05-02 19:41:35,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204790627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:35,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:35,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:41:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225657172] [2021-05-02 19:41:35,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:41:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:41:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:41:35,743 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 19:41:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:35,969 INFO L93 Difference]: Finished difference Result 294 states and 324 transitions. [2021-05-02 19:41:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:41:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 162 [2021-05-02 19:41:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:35,971 INFO L225 Difference]: With dead ends: 294 [2021-05-02 19:41:35,971 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 19:41:35,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:41:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 19:41:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2021-05-02 19:41:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 185 states have (on average 1.0648648648648649) internal successors, (197), 191 states have internal predecessors, (197), 62 states have call successors, (62), 40 states have call predecessors, (62), 38 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 19:41:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2021-05-02 19:41:35,979 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 162 [2021-05-02 19:41:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:35,979 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2021-05-02 19:41:35,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 19:41:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2021-05-02 19:41:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 19:41:35,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:35,980 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:36,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:36,181 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1937088971, now seen corresponding path program 5 times [2021-05-02 19:41:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:36,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852322704] [2021-05-02 19:41:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:36,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:36,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683931145] [2021-05-02 19:41:36,188 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 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 19:41:36,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-02 19:41:36,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:41:36,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:36,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 52 proven. 1284 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 19:41:36,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:36,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852322704] [2021-05-02 19:41:36,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:36,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683931145] [2021-05-02 19:41:36,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683931145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:36,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:36,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:41:36,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994098168] [2021-05-02 19:41:36,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:41:36,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:41:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:41:36,632 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 19:41:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:36,889 INFO L93 Difference]: Finished difference Result 350 states and 390 transitions. [2021-05-02 19:41:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:41:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-02 19:41:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:36,891 INFO L225 Difference]: With dead ends: 350 [2021-05-02 19:41:36,891 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 19:41:36,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:41:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 19:41:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2021-05-02 19:41:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 218 states have (on average 1.0642201834862386) internal successors, (232), 226 states have internal predecessors, (232), 76 states have call successors, (76), 46 states have call predecessors, (76), 44 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 19:41:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2021-05-02 19:41:36,901 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 178 [2021-05-02 19:41:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:36,902 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2021-05-02 19:41:36,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 19:41:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2021-05-02 19:41:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 19:41:36,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:36,903 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:37,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 19:41:37,121 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash 846162435, now seen corresponding path program 3 times [2021-05-02 19:41:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:37,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659073802] [2021-05-02 19:41:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:37,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:37,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268789893] [2021-05-02 19:41:37,127 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 19:41:37,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:41:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:41:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:37,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 243 proven. 94 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-05-02 19:41:37,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:37,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659073802] [2021-05-02 19:41:37,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:37,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268789893] [2021-05-02 19:41:37,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268789893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:37,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:37,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:41:37,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559252514] [2021-05-02 19:41:37,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:41:37,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:37,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:41:37,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:41:37,604 INFO L87 Difference]: Start difference. First operand 339 states and 379 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:41:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:45,921 INFO L93 Difference]: Finished difference Result 346 states and 384 transitions. [2021-05-02 19:41:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:41:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 183 [2021-05-02 19:41:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:45,923 INFO L225 Difference]: With dead ends: 346 [2021-05-02 19:41:45,923 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 19:41:45,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:41:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 19:41:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-05-02 19:41:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 209 states have (on average 1.0478468899521531) internal successors, (219), 214 states have internal predecessors, (219), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:41:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-05-02 19:41:45,931 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 183 [2021-05-02 19:41:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:45,931 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-05-02 19:41:45,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:41:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-05-02 19:41:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 19:41:45,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:45,933 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 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 19:41:46,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 19:41:46,133 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2011105538, now seen corresponding path program 7 times [2021-05-02 19:41:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543303651] [2021-05-02 19:41:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:46,140 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:46,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474016882] [2021-05-02 19:41:46,140 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 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 19:41:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:41:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:41:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:46,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 59 proven. 1391 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-05-02 19:41:46,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543303651] [2021-05-02 19:41:46,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474016882] [2021-05-02 19:41:46,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474016882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:46,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:46,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:41:46,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202850612] [2021-05-02 19:41:46,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:41:46,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:41:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:41:46,582 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 19:41:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:46,869 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2021-05-02 19:41:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:41:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) Word has length 186 [2021-05-02 19:41:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:46,871 INFO L225 Difference]: With dead ends: 338 [2021-05-02 19:41:46,871 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 19:41:46,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:41:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 19:41:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-05-02 19:41:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 215 states have (on average 1.0465116279069768) internal successors, (225), 218 states have internal predecessors, (225), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:41:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 365 transitions. [2021-05-02 19:41:46,879 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 365 transitions. Word has length 186 [2021-05-02 19:41:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:46,879 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 365 transitions. [2021-05-02 19:41:46,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 19:41:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 365 transitions. [2021-05-02 19:41:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 19:41:46,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:46,881 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:47,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 19:41:47,097 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1344678430, now seen corresponding path program 6 times [2021-05-02 19:41:47,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:47,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345053315] [2021-05-02 19:41:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:47,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:47,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956897286] [2021-05-02 19:41:47,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:47,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 19:41:47,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 19:41:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 287 proven. 191 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-05-02 19:41:47,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:47,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345053315] [2021-05-02 19:41:47,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956897286] [2021-05-02 19:41:47,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956897286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:47,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:47,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:41:47,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364040386] [2021-05-02 19:41:47,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:41:47,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:47,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:41:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:41:47,630 INFO L87 Difference]: Start difference. First operand 330 states and 365 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:41:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:54,026 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2021-05-02 19:41:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:41:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 202 [2021-05-02 19:41:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:54,028 INFO L225 Difference]: With dead ends: 353 [2021-05-02 19:41:54,028 INFO L226 Difference]: Without dead ends: 347 [2021-05-02 19:41:54,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:41:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-02 19:41:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2021-05-02 19:41:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 230 states have internal predecessors, (235), 71 states have call successors, (71), 49 states have call predecessors, (71), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:41:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2021-05-02 19:41:54,035 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 202 [2021-05-02 19:41:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:54,036 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2021-05-02 19:41:54,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:41:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2021-05-02 19:41:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:41:54,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:54,037 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 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 19:41:54,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 19:41:54,238 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1224029721, now seen corresponding path program 8 times [2021-05-02 19:41:54,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:54,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599092705] [2021-05-02 19:41:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:54,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:54,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549341311] [2021-05-02 19:41:54,245 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 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 19:41:54,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:41:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:54,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 19:41:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 214 proven. 146 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-05-02 19:41:54,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:54,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599092705] [2021-05-02 19:41:54,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:54,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549341311] [2021-05-02 19:41:54,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549341311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:54,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:54,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:41:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314649101] [2021-05-02 19:41:54,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:41:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:41:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:41:54,989 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 19:41:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:55,542 INFO L93 Difference]: Finished difference Result 424 states and 485 transitions. [2021-05-02 19:41:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:41:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 210 [2021-05-02 19:41:55,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:55,544 INFO L225 Difference]: With dead ends: 424 [2021-05-02 19:41:55,544 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 19:41:55,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:41:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 19:41:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-05-02 19:41:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 250 states have (on average 1.056) internal successors, (264), 253 states have internal predecessors, (264), 92 states have call successors, (92), 49 states have call predecessors, (92), 47 states have return successors, (90), 87 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 19:41:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 446 transitions. [2021-05-02 19:41:55,554 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 446 transitions. Word has length 210 [2021-05-02 19:41:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:55,554 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 446 transitions. [2021-05-02 19:41:55,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 19:41:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 446 transitions. [2021-05-02 19:41:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:41:55,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:55,556 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 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 19:41:55,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:55,769 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1125291239, now seen corresponding path program 9 times [2021-05-02 19:41:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80005290] [2021-05-02 19:41:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:55,777 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:55,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150887010] [2021-05-02 19:41:55,777 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 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 19:41:55,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:41:55,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 19:41:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:55,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:55,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:04,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:04,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:04,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 358 proven. 157 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2021-05-02 19:42:08,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:42:08,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80005290] [2021-05-02 19:42:08,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:42:08,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150887010] [2021-05-02 19:42:08,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150887010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:42:08,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:42:08,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:42:08,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480031582] [2021-05-02 19:42:08,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:42:08,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:42:08,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:42:08,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-05-02 19:42:08,743 INFO L87 Difference]: Start difference. First operand 390 states and 446 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 19:42:35,104 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 19:43:48,967 WARN L205 SmtUtils]: Spent 37.51 s on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-02 19:44:28,683 WARN L205 SmtUtils]: Spent 33.54 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 19:45:10,623 WARN L205 SmtUtils]: Spent 33.81 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-02 19:46:09,550 WARN L205 SmtUtils]: Spent 40.83 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 19:46:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:26,104 INFO L93 Difference]: Finished difference Result 522 states and 647 transitions. [2021-05-02 19:46:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:46:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 210 [2021-05-02 19:46:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:26,107 INFO L225 Difference]: With dead ends: 522 [2021-05-02 19:46:26,107 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 19:46:26,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 198844.1ms TimeCoverageRelationStatistics Valid=117, Invalid=413, Unknown=22, NotChecked=0, Total=552 [2021-05-02 19:46:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 19:46:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-05-02 19:46:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 273 states have (on average 1.0622710622710623) internal successors, (290), 277 states have internal predecessors, (290), 113 states have call successors, (113), 51 states have call predecessors, (113), 49 states have return successors, (111), 107 states have call predecessors, (111), 111 states have call successors, (111) [2021-05-02 19:46:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 514 transitions. [2021-05-02 19:46:26,121 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 514 transitions. Word has length 210 [2021-05-02 19:46:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:26,121 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 514 transitions. [2021-05-02 19:46:26,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 19:46:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 514 transitions. [2021-05-02 19:46:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 19:46:26,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:26,123 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:26,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:26,341 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1541434116, now seen corresponding path program 10 times [2021-05-02 19:46:26,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:26,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332860395] [2021-05-02 19:46:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:26,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:26,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313186418] [2021-05-02 19:46:26,351 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 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 19:46:26,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:46:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 19:46:26,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:26,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:26,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 83 proven. 332 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-05-02 19:46:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332860395] [2021-05-02 19:46:27,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313186418] [2021-05-02 19:46:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313186418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:27,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:27,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 19:46:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386028086] [2021-05-02 19:46:27,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 19:46:27,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:27,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 19:46:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:46:27,906 INFO L87 Difference]: Start difference. First operand 436 states and 514 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 19:46:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:29,445 INFO L93 Difference]: Finished difference Result 500 states and 578 transitions. [2021-05-02 19:46:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 19:46:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) Word has length 242 [2021-05-02 19:46:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:29,451 INFO L225 Difference]: With dead ends: 500 [2021-05-02 19:46:29,451 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 19:46:29,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-02 19:46:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 19:46:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-05-02 19:46:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 247 states have (on average 1.0647773279352226) internal successors, (263), 250 states have internal predecessors, (263), 101 states have call successors, (101), 47 states have call predecessors, (101), 45 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 19:46:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 463 transitions. [2021-05-02 19:46:29,462 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 463 transitions. Word has length 242 [2021-05-02 19:46:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:29,462 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 463 transitions. [2021-05-02 19:46:29,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 19:46:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 463 transitions. [2021-05-02 19:46:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 19:46:29,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:29,464 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:29,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 19:46:29,678 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 716020763, now seen corresponding path program 11 times [2021-05-02 19:46:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:29,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112136314] [2021-05-02 19:46:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:29,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:29,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205870866] [2021-05-02 19:46:29,686 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 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 19:46:29,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 19:46:29,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:29,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:46:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:29,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 3280 proven. 8 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-05-02 19:46:30,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:30,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112136314] [2021-05-02 19:46:30,418 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205870866] [2021-05-02 19:46:30,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205870866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:30,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:30,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:46:30,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228239364] [2021-05-02 19:46:30,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:46:30,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:46:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:46:30,420 INFO L87 Difference]: Start difference. First operand 394 states and 463 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 14 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 19:46:30,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:30,913 INFO L93 Difference]: Finished difference Result 459 states and 501 transitions. [2021-05-02 19:46:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:46:30,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 14 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) Word has length 266 [2021-05-02 19:46:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:30,915 INFO L225 Difference]: With dead ends: 459 [2021-05-02 19:46:30,915 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:46:30,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:46:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:46:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:46:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:46:30,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 266 [2021-05-02 19:46:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:30,915 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:46:30,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 14 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 19:46:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:46:30,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:46:31,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 19:46:31,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:46:31 BasicIcfg [2021-05-02 19:46:31,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:46:31,120 INFO L168 Benchmark]: Toolchain (without parser) took 359180.61 ms. Allocated memory was 184.5 MB in the beginning and 320.9 MB in the end (delta: 136.3 MB). Free memory was 149.9 MB in the beginning and 240.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:31,120 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:46:31,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 184.5 MB. Free memory was 149.6 MB in the beginning and 167.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:31,120 INFO L168 Benchmark]: Boogie Preprocessor took 46.58 ms. Allocated memory is still 184.5 MB. Free memory was 167.5 MB in the beginning and 165.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:31,120 INFO L168 Benchmark]: RCFGBuilder took 395.25 ms. Allocated memory is still 184.5 MB. Free memory was 165.8 MB in the beginning and 149.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:31,120 INFO L168 Benchmark]: IcfgTransformer took 18.37 ms. Allocated memory is still 184.5 MB. Free memory was 149.7 MB in the beginning and 148.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:31,120 INFO L168 Benchmark]: TraceAbstraction took 358453.88 ms. Allocated memory was 184.5 MB in the beginning and 320.9 MB in the end (delta: 136.3 MB). Free memory was 148.0 MB in the beginning and 240.5 MB in the end (delta: -92.5 MB). Peak memory consumption was 44.2 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:31,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 184.5 MB. Free memory was 149.6 MB in the beginning and 167.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.58 ms. Allocated memory is still 184.5 MB. Free memory was 167.5 MB in the beginning and 165.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 395.25 ms. Allocated memory is still 184.5 MB. Free memory was 165.8 MB in the beginning and 149.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.37 ms. Allocated memory is still 184.5 MB. Free memory was 149.7 MB in the beginning and 148.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 358453.88 ms. Allocated memory was 184.5 MB in the beginning and 320.9 MB in the end (delta: 136.3 MB). Free memory was 148.0 MB in the beginning and 240.5 MB in the end (delta: -92.5 MB). Peak memory consumption was 44.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 358410.9ms, OverallIterations: 33, TraceHistogramMax: 41, EmptinessCheckTime: 45.0ms, AutomataDifference: 322585.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1804 SDtfs, 1289 SDslu, 7930 SDs, 0 SdLazy, 7742 SolverSat, 1252 SolverUnsat, 56 SolverUnknown, 0 SolverNotchecked, 121999.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3704 GetRequests, 3315 SyntacticMatches, 5 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 211263.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=436occurred in iteration=31, InterpolantAutomatonStates: 390, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 328.4ms AutomataMinimizationTime, 33 MinimizatonAttempts, 287 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 448.9ms SsaConstructionTime, 1211.8ms SatisfiabilityAnalysisTime, 25463.6ms InterpolantComputationTime, 3635 NumberOfCodeBlocks, 3064 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 3602 ConstructedInterpolants, 0 QuantifiedInterpolants, 14855 SizeOfPredicates, 174 NumberOfNonLiveVariables, 8570 ConjunctsInSsa, 770 ConjunctsInUnsatCore, 33 InterpolantComputations, 7 PerfectInterpolantSequences, 18974/24674 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...