/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/hard-u_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:56:41,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:56:41,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:56:41,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:56:41,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:56:41,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:56:41,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:56:41,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:56:41,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:56:41,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:56:41,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:56:41,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:56:41,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:56:41,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:56:41,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:56:41,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:56:41,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:56:41,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:56:41,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:56:41,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:56:41,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:56:41,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:56:41,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:56:41,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:56:41,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:56:41,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:56:41,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:56:41,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:56:41,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:56:41,203 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:56:41,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:56:41,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:56:41,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:56:41,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:56:41,470 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:56:41,471 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:56:41,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2021-05-06 08:56:41,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fc9e400f/5e646cf6efed43a0905609a406df48c1/FLAGfb6582eb7 [2021-05-06 08:56:41,889 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:56:41,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2021-05-06 08:56:41,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fc9e400f/5e646cf6efed43a0905609a406df48c1/FLAGfb6582eb7 [2021-05-06 08:56:42,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fc9e400f/5e646cf6efed43a0905609a406df48c1 [2021-05-06 08:56:42,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:56:42,320 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:56:42,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:56:42,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:56:42,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:56:42,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b886f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42, skipping insertion in model container [2021-05-06 08:56:42,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:56:42,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:56:42,443 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/hard-u_unwindbound10.c[545,558] [2021-05-06 08:56:42,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:56:42,473 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:56:42,516 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/hard-u_unwindbound10.c[545,558] [2021-05-06 08:56:42,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:56:42,551 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:56:42,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42 WrapperNode [2021-05-06 08:56:42,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:56:42,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:56:42,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:56:42,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:56:42,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:56:42,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:56:42,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:56:42,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:56:42,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (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 [2021-05-06 08:56:42,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:56:42,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:56:42,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:56:42,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:56:42,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:56:42,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:56:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:56:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:56:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:56:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:56:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:56:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:56:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:56:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:56:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:56:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:56:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:56:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:56:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:56:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:56:42,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:56:42,866 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:56:42,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:56:42 BoogieIcfgContainer [2021-05-06 08:56:42,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:56:42,867 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:56:42,867 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:56:42,868 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:56:42,869 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:56:42" (1/1) ... [2021-05-06 08:56:42,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:56:42 BasicIcfg [2021-05-06 08:56:42,880 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:56:42,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:56:42,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:56:42,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:56:42,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:56:42" (1/4) ... [2021-05-06 08:56:42,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebf779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:56:42, skipping insertion in model container [2021-05-06 08:56:42,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:56:42" (2/4) ... [2021-05-06 08:56:42,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebf779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:56:42, skipping insertion in model container [2021-05-06 08:56:42,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:56:42" (3/4) ... [2021-05-06 08:56:42,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebf779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:56:42, skipping insertion in model container [2021-05-06 08:56:42,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:56:42" (4/4) ... [2021-05-06 08:56:42,885 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.cJordan [2021-05-06 08:56:42,889 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:56:42,891 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:56:42,902 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:56:42,913 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:56:42,914 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:56:42,914 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:56:42,914 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:56:42,914 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:56:42,914 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:56:42,914 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:56:42,914 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:56:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 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) [2021-05-06 08:56:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:56:42,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:42,927 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:56:42,927 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:56:42,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:42,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110274227] [2021-05-06 08:56:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:56:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:56:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:56:43,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:43,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110274227] [2021-05-06 08:56:43,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110274227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:43,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:43,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:56:43,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96471269] [2021-05-06 08:56:43,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:56:43,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:56:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:56:43,140 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-05-06 08:56:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:43,274 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:56:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:56:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2021-05-06 08:56:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:43,280 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:56:43,280 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:56:43,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:56:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:56:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:56:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 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) [2021-05-06 08:56:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:56:43,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:56:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:43,310 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:56:43,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2021-05-06 08:56:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:56:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:56:43,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:43,311 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:56:43,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:56:43,311 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:56:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:43,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538433644] [2021-05-06 08:56:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:56:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:56:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:56:43,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:43,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538433644] [2021-05-06 08:56:43,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538433644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:43,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:43,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:56:43,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127338077] [2021-05-06 08:56:43,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:56:43,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:43,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:56:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:43,475 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:56:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:43,752 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:56:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:56:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:56:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:43,754 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:56:43,754 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:56:43,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:56:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:56:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:56:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:56:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:56:43,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:56:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:43,771 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:56:43,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:56:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:56:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:56:43,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:43,773 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:56:43,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:56:43,776 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:56:43,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:43,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347205164] [2021-05-06 08:56:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:43,790 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:43,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240972640] [2021-05-06 08:56:43,791 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 [2021-05-06 08:56:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:43,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:56:43,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:44,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:44,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:56:44,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:44,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347205164] [2021-05-06 08:56:44,053 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:44,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240972640] [2021-05-06 08:56:44,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240972640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:44,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:44,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:56:44,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823331822] [2021-05-06 08:56:44,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:56:44,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:44,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:56:44,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:56:44,055 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-05-06 08:56:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:44,072 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:56:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:56:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2021-05-06 08:56:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:44,073 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:56:44,073 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:56:44,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:56:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:56:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:56:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:56:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:56:44,091 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:56:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:44,091 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:56:44,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-05-06 08:56:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:56:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:56:44,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:44,092 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] [2021-05-06 08:56:44,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:56:44,293 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:56:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:44,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213810980] [2021-05-06 08:56:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:44,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:56:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:44,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:56:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:44,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:56:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:56:44,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213810980] [2021-05-06 08:56:44,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213810980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:44,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:44,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:56:44,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135244347] [2021-05-06 08:56:44,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:56:44,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:56:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:44,370 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:56:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:44,597 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:56:44,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:56:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:56:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:44,599 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:56:44,599 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:56:44,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:56:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:56:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:56:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:56:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:56:44,602 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:56:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:44,603 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:56:44,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:56:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:56:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:56:44,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:44,603 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] [2021-05-06 08:56:44,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:56:44,604 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:56:44,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:44,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738613007] [2021-05-06 08:56:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:44,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:44,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290845275] [2021-05-06 08:56:44,612 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 [2021-05-06 08:56:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:56:44,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:44,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:56:44,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738613007] [2021-05-06 08:56:44,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290845275] [2021-05-06 08:56:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290845275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:44,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:44,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:56:44,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998352703] [2021-05-06 08:56:44,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:56:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:56:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:56:44,757 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:56:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:46,980 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-05-06 08:56:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:56:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:56:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:46,981 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:56:46,981 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:56:46,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:56:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:56:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:56:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 08:56:46,985 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 08:56:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:46,986 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 08:56:46,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:56:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 08:56:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:56:46,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:46,986 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:56:47,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:56:47,197 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:56:47,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21462616] [2021-05-06 08:56:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:47,207 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:47,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206476580] [2021-05-06 08:56:47,207 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 [2021-05-06 08:56:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:56:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:56:47,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:47,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21462616] [2021-05-06 08:56:47,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:47,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206476580] [2021-05-06 08:56:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206476580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:47,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:47,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:56:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297573808] [2021-05-06 08:56:47,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:56:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:56:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:56:47,369 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:56:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:47,398 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-06 08:56:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:56:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:56:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:47,399 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:56:47,399 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:56:47,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:56:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:56:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:56:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:56:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 08:56:47,403 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 08:56:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:47,403 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 08:56:47,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:56:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 08:56:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:56:47,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:47,404 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:56:47,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:56:47,621 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:56:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:47,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360269898] [2021-05-06 08:56:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:47,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:47,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843484576] [2021-05-06 08:56:47,629 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 [2021-05-06 08:56:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:47,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:56:47,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:47,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:56:47,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360269898] [2021-05-06 08:56:47,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843484576] [2021-05-06 08:56:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843484576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:56:47,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:56:47,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:56:47,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453951038] [2021-05-06 08:56:47,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:56:47,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:56:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:47,811 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:56:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:47,946 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-05-06 08:56:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:56:47,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:56:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:47,947 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:56:47,947 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 08:56:47,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:56:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 08:56:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 08:56:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:56:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 08:56:47,952 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 08:56:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:47,952 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 08:56:47,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:56:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 08:56:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:56:47,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:47,953 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-05-06 08:56:48,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:56:48,154 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:56:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:48,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265751886] [2021-05-06 08:56:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:48,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:48,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526447336] [2021-05-06 08:56:48,178 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 [2021-05-06 08:56:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:48,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:56:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:48,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:56:48,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265751886] [2021-05-06 08:56:48,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526447336] [2021-05-06 08:56:48,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526447336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:56:48,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:56:48,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:56:48,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802992952] [2021-05-06 08:56:48,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:56:48,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:56:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:56:48,303 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:56:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:48,352 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-05-06 08:56:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:56:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:56:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:48,354 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:56:48,354 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:56:48,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:56:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 08:56:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:56:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 08:56:48,359 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 08:56:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:48,359 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 08:56:48,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:56:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 08:56:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:56:48,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:48,360 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:56:48,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:56:48,577 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:56:48,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:48,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127865359] [2021-05-06 08:56:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:48,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:48,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964179471] [2021-05-06 08:56:48,584 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 [2021-05-06 08:56:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:56:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:56:48,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127865359] [2021-05-06 08:56:48,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:48,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964179471] [2021-05-06 08:56:48,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964179471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:56:48,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:56:48,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:56:48,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594139876] [2021-05-06 08:56:48,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:56:48,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:56:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:48,816 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:56:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:51,101 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:56:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:56:51,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:56:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:51,103 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:56:51,103 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:56:51,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:56:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:56:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 08:56:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:56:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 08:56:51,108 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 08:56:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:51,108 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 08:56:51,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:56:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 08:56:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:56:51,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:51,109 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] [2021-05-06 08:56:51,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:56:51,314 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2021-05-06 08:56:51,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:51,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672419980] [2021-05-06 08:56:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:51,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:51,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102185843] [2021-05-06 08:56:51,336 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 [2021-05-06 08:56:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:56:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:56:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:56:51,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:56:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:56:51,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:56:51,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672419980] [2021-05-06 08:56:51,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:56:51,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102185843] [2021-05-06 08:56:51,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102185843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:56:51,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:56:51,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:56:51,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361737116] [2021-05-06 08:56:51,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:56:51,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:56:51,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:56:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:56:51,502 INFO L87 Difference]: Start difference. First operand 93 states and 114 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) [2021-05-06 08:56:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:56:51,573 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-05-06 08:56:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:56:51,574 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 [2021-05-06 08:56:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:56:51,575 INFO L225 Difference]: With dead ends: 115 [2021-05-06 08:56:51,575 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 08:56:51,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:56:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 08:56:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 08:56:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:56:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-05-06 08:56:51,579 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 50 [2021-05-06 08:56:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:56:51,579 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-05-06 08:56:51,579 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) [2021-05-06 08:56:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-05-06 08:56:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:56:51,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:56:51,580 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-06 08:56:51,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:56:51,799 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:56:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:56:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2021-05-06 08:56:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:56:51,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399846376] [2021-05-06 08:56:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:56:51,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:56:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938346404] [2021-05-06 08:56:51,806 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