/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/geo2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:34:31,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:34:31,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:34:31,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:34:31,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:34:31,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:34:31,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:34:31,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:34:31,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:34:31,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:34:31,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:34:31,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:34:31,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:34:31,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:34:31,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:34:31,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:34:31,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:34:31,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:34:31,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:34:31,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:34:31,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:34:31,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:34:31,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:34:31,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:34:31,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:34:31,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:34:31,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:34:31,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:34:31,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:34:31,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:34:31,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:34:31,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:34:31,627 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:34:31,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:34:31,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:34:31,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:34:31,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:34:31,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:34:31,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:34:31,629 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:34:31,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:34:31,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:34:31,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:34:31,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:34:31,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:34:31,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:34:31,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:34:31,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:34:31,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:34:31,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:34:31,632 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:34:31,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:34:31,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:34:31,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:34:31,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:34:31,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:34:31,957 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:34:31,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c [2021-05-06 08:34:32,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce7f328a/e03db56ceb874c7cb81b1b16796e9095/FLAG03db0f6de [2021-05-06 08:34:32,402 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:34:32,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c [2021-05-06 08:34:32,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce7f328a/e03db56ceb874c7cb81b1b16796e9095/FLAG03db0f6de [2021-05-06 08:34:32,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce7f328a/e03db56ceb874c7cb81b1b16796e9095 [2021-05-06 08:34:32,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:34:32,844 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:34:32,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:34:32,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:34:32,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:34:32,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:34:32" (1/1) ... [2021-05-06 08:34:32,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd62318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:32, skipping insertion in model container [2021-05-06 08:34:32,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:34:32" (1/1) ... [2021-05-06 08:34:32,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:34:32,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:34:32,980 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/geo2-ll_unwindbound50.c[525,538] [2021-05-06 08:34:32,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:34:32,996 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:34:33,006 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/geo2-ll_unwindbound50.c[525,538] [2021-05-06 08:34:33,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:34:33,021 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:34:33,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33 WrapperNode [2021-05-06 08:34:33,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:34:33,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:34:33,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:34:33,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:34:33,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:34:33,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:34:33,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:34:33,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:34:33,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (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 08:34:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:34:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:34:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:34:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:34:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:34:33,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:34:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:34:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:34:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:34:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:34:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:34:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:34:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:34:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:34:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:34:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:34:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:34:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:34:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:34:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:34:33,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:34:33,441 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:34:33,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:34:33 BoogieIcfgContainer [2021-05-06 08:34:33,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:34:33,443 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:34:33,443 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:34:33,443 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:34:33,445 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:34:33" (1/1) ... [2021-05-06 08:34:33,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:34:33 BasicIcfg [2021-05-06 08:34:33,456 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:34:33,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:34:33,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:34:33,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:34:33,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:34:32" (1/4) ... [2021-05-06 08:34:33,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d9c8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:34:33, skipping insertion in model container [2021-05-06 08:34:33,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:34:33" (2/4) ... [2021-05-06 08:34:33,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d9c8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:34:33, skipping insertion in model container [2021-05-06 08:34:33,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:34:33" (3/4) ... [2021-05-06 08:34:33,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d9c8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:34:33, skipping insertion in model container [2021-05-06 08:34:33,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:34:33" (4/4) ... [2021-05-06 08:34:33,462 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound50.cJordan [2021-05-06 08:34:33,466 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:34:33,469 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:34:33,496 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:34:33,512 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:34:33,512 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:34:33,512 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:34:33,512 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:34:33,512 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:34:33,513 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:34:33,513 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:34:33,513 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:34:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:34:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:34:33,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:33,528 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:33,528 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:34:33,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:33,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136709473] [2021-05-06 08:34:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:34:33,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:34:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:34:33,758 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 08:34:33,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:33,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136709473] [2021-05-06 08:34:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136709473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:34:33,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:34:33,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:34:33,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793115409] [2021-05-06 08:34:33,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:34:33,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:34:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:34:33,775 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:34:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:34:33,829 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 08:34:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:34:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:34:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:34:33,837 INFO L225 Difference]: With dead ends: 23 [2021-05-06 08:34:33,837 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 08:34:33,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:34:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 08:34:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 08:34:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:34:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:34:33,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:34:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:34:33,862 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:34:33,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:34:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:34:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:34:33,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:33,863 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:33,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:34:33,864 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:34:33,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:33,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160420315] [2021-05-06 08:34:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:33,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:34:33,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148373606] [2021-05-06 08:34:33,880 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 08:34:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:34:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:34:33,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:34:33,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:33,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:33,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,035 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 08:34:34,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:34,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160420315] [2021-05-06 08:34:34,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:34:34,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148373606] [2021-05-06 08:34:34,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148373606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:34:34,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:34:34,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:34:34,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605693729] [2021-05-06 08:34:34,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:34:34,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:34,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:34:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:34:34,040 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:34:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:34:34,068 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:34:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:34:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:34:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:34:34,069 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:34:34,070 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:34:34,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:34:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:34:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:34:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:34:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:34:34,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:34:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:34:34,074 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:34:34,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:34:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:34:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:34:34,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:34,074 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:34,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:34:34,276 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:34:34,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:34,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109009683] [2021-05-06 08:34:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:34,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:34:34,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51894157] [2021-05-06 08:34:34,289 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 08:34:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:34:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:34:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:34:34,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,433 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 08:34:34,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:34,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109009683] [2021-05-06 08:34:34,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:34:34,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51894157] [2021-05-06 08:34:34,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51894157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:34:34,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:34:34,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:34:34,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012246705] [2021-05-06 08:34:34,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:34:34,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:34:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:34:34,436 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:34:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:34:34,482 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:34:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:34:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:34:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:34:34,487 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:34:34,487 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:34:34,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:34:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:34:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:34:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:34:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:34:34,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:34:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:34:34,492 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:34:34,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:34:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:34:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:34:34,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:34,493 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:34,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:34:34,705 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:34:34,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:34,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164012358] [2021-05-06 08:34:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:34,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:34:34,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26005827] [2021-05-06 08:34:34,717 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 08:34:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:34:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:34:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:34:34,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:34:34,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:34,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164012358] [2021-05-06 08:34:34,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:34:34,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26005827] [2021-05-06 08:34:34,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26005827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:34:34,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:34:34,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:34:34,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051287108] [2021-05-06 08:34:34,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:34:34,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:34:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:34:34,887 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:34:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:34:34,914 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:34:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:34:34,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:34:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:34:34,915 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:34:34,915 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:34:34,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:34:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:34:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:34:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:34:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:34:34,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:34:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:34:34,920 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:34:34,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:34:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:34:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:34:34,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:34,920 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:35,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:34:35,138 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:34:35,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:35,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241652566] [2021-05-06 08:34:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:35,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:34:35,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068281087] [2021-05-06 08:34:35,155 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 08:34:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:34:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:34:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:34:35,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:34:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:35,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241652566] [2021-05-06 08:34:35,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:34:35,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068281087] [2021-05-06 08:34:35,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068281087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:34:35,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:34:35,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:34:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196840829] [2021-05-06 08:34:35,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:34:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:34:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:34:35,310 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:34:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:34:35,356 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:34:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:34:35,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:34:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:34:35,359 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:34:35,359 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:34:35,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:34:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:34:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:34:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:34:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:34:35,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:34:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:34:35,374 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:34:35,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:34:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:34:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:34:35,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:35,376 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:35,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:34:35,589 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:34:35,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:35,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365360629] [2021-05-06 08:34:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:35,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:34:35,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839449070] [2021-05-06 08:34:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:34:35,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:34:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:34:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:34:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:34:35,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:34:35,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:35,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365360629] [2021-05-06 08:34:35,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:34:35,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839449070] [2021-05-06 08:34:35,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839449070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:34:35,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:34:35,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:34:35,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650181806] [2021-05-06 08:34:35,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:34:35,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:34:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:34:35,778 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:34:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:34:35,813 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-06 08:34:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:34:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:34:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:34:35,814 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:34:35,814 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:34:35,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:34:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:34:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:34:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:34:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 08:34:35,818 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 08:34:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:34:35,818 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 08:34:35,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:34:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 08:34:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:34:35,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:34:35,819 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:34:36,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:34:36,043 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:34:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:34:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-06 08:34:36,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:34:36,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050278158] [2021-05-06 08:34:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:34:36,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:34:36,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4667278] [2021-05-06 08:34:36,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:34:36,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:34:36,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:34:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:34:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:34:36,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:34:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:34:36,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:34:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050278158] [2021-05-06 08:34:36,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:34:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4667278] [2021-05-06 08:34:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4667278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:34:36,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:34:36,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:34:36,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947789002] [2021-05-06 08:34:36,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:34:36,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:34:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:34:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:34:36,540 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:35:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:35:06,932 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 08:35:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:35:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:35:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:35:06,934 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:35:06,934 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:35:06,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:35:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:35:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:35:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:35:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:35:06,938 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:35:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:35:06,938 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:35:06,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:35:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:35:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:35:06,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:35:06,940 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:35:07,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:35:07,145 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:35:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:35:07,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:35:07,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:35:07,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411007046] [2021-05-06 08:35:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:35:07,165 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:35:07,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239769477] [2021-05-06 08:35:07,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:35:07,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:35:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:35:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:35:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:35:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:35:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:35:07,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:35:07,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411007046] [2021-05-06 08:35:07,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:35:07,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239769477] [2021-05-06 08:35:07,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239769477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:35:07,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:35:07,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:35:07,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889457250] [2021-05-06 08:35:07,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:35:07,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:35:07,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:35:07,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:35:07,556 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)