/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/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:56,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:56,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:56,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:33:56,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:33:56,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:33:56,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:33:56,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:33:56,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:33:56,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:33:56,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:33:56,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:33:56,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:56,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:56,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:56,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:56,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:56,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:56,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:56,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:56,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:56,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:56,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:56,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:56,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:56,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:56,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:56,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:56,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:56,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:56,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:56,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:56,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:56,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:56,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:56,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:56,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:56,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:56,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:56,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:56,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:56,795 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:56,795 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:57,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:57,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:57,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:57,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:57,090 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:57,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-02 20:33:57,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebf1cdb4/bdb8c5fb511c41d7b8a136595c6c2e14/FLAGcf2860ce3 [2021-05-02 20:33:57,569 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:57,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-02 20:33:57,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebf1cdb4/bdb8c5fb511c41d7b8a136595c6c2e14/FLAGcf2860ce3 [2021-05-02 20:33:57,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebf1cdb4/bdb8c5fb511c41d7b8a136595c6c2e14 [2021-05-02 20:33:57,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:57,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:57,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:57,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:57,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:57,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:57" (1/1) ... [2021-05-02 20:33:57,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28529736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:57, skipping insertion in model container [2021-05-02 20:33:57,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:57" (1/1) ... [2021-05-02 20:33:57,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:58,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:58,089 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/egcd3-ll_valuebound20.c[490,503] [2021-05-02 20:33:58,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:58,106 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:58,115 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/egcd3-ll_valuebound20.c[490,503] [2021-05-02 20:33:58,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:58,131 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:58,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58 WrapperNode [2021-05-02 20:33:58,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:58,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:58,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:58,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:58,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:58,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:58,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:58,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:58,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:58,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:58,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:58,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:58,271 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:58,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:58,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:58,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:58,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:58,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:58,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:58,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:58,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:58,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:58,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:58,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:58,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:58,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:58,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:58,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:58,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:58,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:58,436 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:58,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:58 BoogieIcfgContainer [2021-05-02 20:33:58,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:58,438 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:58,438 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:58,438 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:58,440 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:58" (1/1) ... [2021-05-02 20:33:58,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:58 BasicIcfg [2021-05-02 20:33:58,459 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:58,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:58,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:58,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:58,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:57" (1/4) ... [2021-05-02 20:33:58,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b07f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:58, skipping insertion in model container [2021-05-02 20:33:58,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:58" (2/4) ... [2021-05-02 20:33:58,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b07f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:58, skipping insertion in model container [2021-05-02 20:33:58,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:58" (3/4) ... [2021-05-02 20:33:58,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b07f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:58, skipping insertion in model container [2021-05-02 20:33:58,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:58" (4/4) ... [2021-05-02 20:33:58,464 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.cJordan [2021-05-02 20:33:58,471 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:58,474 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:58,486 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:58,499 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:58,499 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:58,499 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:58,499 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:58,499 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:58,499 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:58,499 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:58,499 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:33:58,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:58,515 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:58,515 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-02 20:33:58,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:58,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443861419] [2021-05-02 20:33:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:58,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:58,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:33:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:33:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:58,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:33:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:33:58,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:58,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443861419] [2021-05-02 20:33:58,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443861419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:58,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:58,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:58,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726799438] [2021-05-02 20:33:58,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:58,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:58,792 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:58,881 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 20:33:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:33:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:58,887 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:58,887 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:33:58,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:33:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:33:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 20:33:58,917 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 20:33:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:58,918 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 20:33:58,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 20:33:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:33:58,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:58,920 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:58,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:58,921 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-02 20:33:58,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:58,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557268264] [2021-05-02 20:33:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:58,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:58,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752336166] [2021-05-02 20:33:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:59,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:59,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:59,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557268264] [2021-05-02 20:33:59,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:59,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752336166] [2021-05-02 20:33:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752336166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:59,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:59,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266482104] [2021-05-02 20:33:59,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:59,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:59,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:59,200 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:59,282 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 20:33:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:59,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 20:33:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:59,284 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:33:59,284 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:33:59,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:33:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 20:33:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:33:59,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 20:33:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:59,302 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:33:59,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:33:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:33:59,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:59,307 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:59,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:59,523 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-02 20:33:59,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:59,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295419931] [2021-05-02 20:33:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:59,555 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:59,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037011063] [2021-05-02 20:33:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:33:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:59,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:59,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295419931] [2021-05-02 20:33:59,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037011063] [2021-05-02 20:33:59,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037011063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:59,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:59,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774258332] [2021-05-02 20:33:59,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:59,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:59,826 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:59,908 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 20:33:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 20:33:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:59,911 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:33:59,911 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:33:59,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:33:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:33:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:33:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 20:33:59,923 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 20:33:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:59,923 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 20:33:59,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 20:33:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:33:59,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:59,925 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:00,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:00,140 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-02 20:34:00,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:00,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076766732] [2021-05-02 20:34:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:00,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:00,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242760045] [2021-05-02 20:34:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:34:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:00,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:00,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:00,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076766732] [2021-05-02 20:34:00,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:00,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242760045] [2021-05-02 20:34:00,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242760045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:00,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:00,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460975962] [2021-05-02 20:34:00,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:00,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:00,305 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:00,450 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-02 20:34:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:34:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:00,451 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:34:00,452 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:34:00,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:34:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 20:34:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:34:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 20:34:00,457 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 20:34:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:00,458 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 20:34:00,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 20:34:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:34:00,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:00,458 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:00,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:00,674 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-02 20:34:00,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:00,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764470835] [2021-05-02 20:34:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:00,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:00,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578747342] [2021-05-02 20:34:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:34:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:00,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:00,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764470835] [2021-05-02 20:34:00,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578747342] [2021-05-02 20:34:00,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578747342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:00,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:00,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:34:00,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027868060] [2021-05-02 20:34:00,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:34:00,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:00,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:34:00,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:00,901 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:00,984 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-05-02 20:34:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:34:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:00,985 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:34:00,985 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:34:00,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:34:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 20:34:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:34:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 20:34:00,990 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 20:34:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:00,991 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 20:34:00,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 20:34:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:34:00,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:00,991 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:01,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,206 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-02 20:34:01,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:01,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154131919] [2021-05-02 20:34:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:01,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:01,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140227002] [2021-05-02 20:34:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:34:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:01,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:01,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:01,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154131919] [2021-05-02 20:34:01,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:01,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140227002] [2021-05-02 20:34:01,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140227002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:01,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:01,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:01,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223296511] [2021-05-02 20:34:01,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:01,530 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:01,640 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-05-02 20:34:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 20:34:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,641 INFO L225 Difference]: With dead ends: 109 [2021-05-02 20:34:01,641 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 20:34:01,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 20:34:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 20:34:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:34:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 20:34:01,648 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 20:34:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,648 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 20:34:01,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 20:34:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:01,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:01,649 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:01,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:34:01,867 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:01,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-02 20:34:01,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:01,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326683495] [2021-05-02 20:34:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:01,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:01,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311516945] [2021-05-02 20:34:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:34:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:01,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:34:02,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:02,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326683495] [2021-05-02 20:34:02,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:02,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311516945] [2021-05-02 20:34:02,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311516945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:02,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:02,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:34:02,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318803721] [2021-05-02 20:34:02,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:34:02,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:34:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:02,010 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:34:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:02,130 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-02 20:34:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 20:34:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:02,131 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:34:02,131 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:34:02,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:34:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 20:34:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:34:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 20:34:02,151 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 20:34:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:02,151 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 20:34:02,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:34:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 20:34:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:02,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:02,152 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:02,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,361 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-02 20:34:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:02,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626443367] [2021-05-02 20:34:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:02,368 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:02,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891583844] [2021-05-02 20:34:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:34:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:02,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:02,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626443367] [2021-05-02 20:34:02,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:02,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891583844] [2021-05-02 20:34:02,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891583844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:02,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:02,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:34:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665130967] [2021-05-02 20:34:02,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:34:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:34:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:02,640 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:02,822 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2021-05-02 20:34:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:34:02,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 20:34:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:02,825 INFO L225 Difference]: With dead ends: 122 [2021-05-02 20:34:02,825 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 20:34:02,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:34:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 20:34:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 20:34:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:34:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 20:34:02,846 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 20:34:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:02,846 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 20:34:02,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 20:34:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:02,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:02,847 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:03,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,071 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-02 20:34:03,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:03,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686775306] [2021-05-02 20:34:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:03,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:03,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454581853] [2021-05-02 20:34:03,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:03,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:34:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:03,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:03,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:03,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686775306] [2021-05-02 20:34:03,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:03,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454581853] [2021-05-02 20:34:03,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454581853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:03,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:03,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426409529] [2021-05-02 20:34:03,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:03,204 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:03,256 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-05-02 20:34:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 20:34:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:03,258 INFO L225 Difference]: With dead ends: 130 [2021-05-02 20:34:03,258 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 20:34:03,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 20:34:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 20:34:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:34:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 20:34:03,262 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 20:34:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:03,262 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 20:34:03,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 20:34:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:34:03,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:03,263 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:03,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:34:03,480 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-02 20:34:03,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:03,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955982035] [2021-05-02 20:34:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:03,488 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:03,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508215542] [2021-05-02 20:34:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:34:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:03,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:34:03,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:03,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955982035] [2021-05-02 20:34:03,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:03,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508215542] [2021-05-02 20:34:03,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508215542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:03,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:03,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:34:03,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056602861] [2021-05-02 20:34:03,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:03,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:03,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:03,630 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:34:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:03,689 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2021-05-02 20:34:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 20:34:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:03,690 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:34:03,690 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:34:03,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:34:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 20:34:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:34:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 20:34:03,695 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 20:34:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:03,695 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 20:34:03,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:34:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 20:34:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:34:03,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:03,696 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:03,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,911 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-02 20:34:03,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:03,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132930179] [2021-05-02 20:34:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:03,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:03,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874306412] [2021-05-02 20:34:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:34:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:04,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:34:04,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:04,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132930179] [2021-05-02 20:34:04,155 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:04,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874306412] [2021-05-02 20:34:04,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874306412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:04,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:04,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:34:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999221409] [2021-05-02 20:34:04,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:34:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:34:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:04,156 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:34:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:04,358 INFO L93 Difference]: Finished difference Result 183 states and 259 transitions. [2021-05-02 20:34:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:34:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 20:34:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:04,361 INFO L225 Difference]: With dead ends: 183 [2021-05-02 20:34:04,361 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 20:34:04,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 20:34:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 20:34:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:34:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 20:34:04,370 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 20:34:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:04,371 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 20:34:04,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:34:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 20:34:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:34:04,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:04,372 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:04,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:04,588 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-02 20:34:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628002488] [2021-05-02 20:34:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:04,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:04,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114304298] [2021-05-02 20:34:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:04,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 20:34:04,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:04,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:34:04,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:04,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628002488] [2021-05-02 20:34:04,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114304298] [2021-05-02 20:34:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114304298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:04,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:04,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:34:04,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871744339] [2021-05-02 20:34:04,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:34:04,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:04,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:34:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:34:04,931 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:34:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:05,383 INFO L93 Difference]: Finished difference Result 186 states and 251 transitions. [2021-05-02 20:34:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:05,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 20:34:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:05,384 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:34:05,385 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 20:34:05,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:34:05,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 20:34:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 20:34:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 20:34:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 20:34:05,391 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 20:34:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:05,391 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 20:34:05,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:34:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 20:34:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:34:05,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:05,392 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:05,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:34:05,610 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-02 20:34:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:05,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61037923] [2021-05-02 20:34:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:05,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:05,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567767334] [2021-05-02 20:34:05,617 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:05,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:34:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:34:05,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:05,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61037923] [2021-05-02 20:34:05,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:05,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567767334] [2021-05-02 20:34:05,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567767334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:05,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:05,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:05,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301340422] [2021-05-02 20:34:05,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:05,794 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:34:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:06,091 INFO L93 Difference]: Finished difference Result 320 states and 476 transitions. [2021-05-02 20:34:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:34:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 20:34:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:06,094 INFO L225 Difference]: With dead ends: 320 [2021-05-02 20:34:06,095 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 20:34:06,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 20:34:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 20:34:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:34:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 20:34:06,114 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 20:34:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:06,115 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 20:34:06,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:34:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 20:34:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:34:06,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:06,118 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:06,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:34:06,335 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-02 20:34:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:06,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666110145] [2021-05-02 20:34:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:06,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:06,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124382908] [2021-05-02 20:34:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:34:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:06,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:34:06,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:06,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666110145] [2021-05-02 20:34:06,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:06,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124382908] [2021-05-02 20:34:06,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124382908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:06,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:06,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:06,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499636403] [2021-05-02 20:34:06,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:06,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:06,555 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:34:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:06,696 INFO L93 Difference]: Finished difference Result 246 states and 341 transitions. [2021-05-02 20:34:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 20:34:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:06,698 INFO L225 Difference]: With dead ends: 246 [2021-05-02 20:34:06,698 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 20:34:06,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:34:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 20:34:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 20:34:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 20:34:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 20:34:06,706 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 20:34:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:06,706 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 20:34:06,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:34:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 20:34:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:34:06,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:06,707 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:06,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:34:06,923 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-02 20:34:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416830291] [2021-05-02 20:34:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:06,933 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:06,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591400087] [2021-05-02 20:34:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:34:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:34:07,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:07,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416830291] [2021-05-02 20:34:07,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591400087] [2021-05-02 20:34:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591400087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:07,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:07,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:34:07,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010182299] [2021-05-02 20:34:07,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:34:07,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:34:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:34:07,389 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:08,636 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:34:08,890 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 20:34:09,176 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:34:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:10,157 INFO L93 Difference]: Finished difference Result 369 states and 532 transitions. [2021-05-02 20:34:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 20:34:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 20:34:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:10,159 INFO L225 Difference]: With dead ends: 369 [2021-05-02 20:34:10,159 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 20:34:10,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1952.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:34:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 20:34:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 20:34:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 20:34:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 20:34:10,169 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 20:34:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:10,170 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 20:34:10,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 20:34:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:10,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:10,170 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:10,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:10,385 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:10,385 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-02 20:34:10,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:10,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187280484] [2021-05-02 20:34:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:10,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:10,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923587371] [2021-05-02 20:34:10,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:10,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:10,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:34:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:10,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:34:10,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187280484] [2021-05-02 20:34:10,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923587371] [2021-05-02 20:34:10,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923587371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:10,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:10,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:10,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072078026] [2021-05-02 20:34:10,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:10,558 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:10,591 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2021-05-02 20:34:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:10,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 20:34:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:10,593 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:34:10,593 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:34:10,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:34:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 20:34:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:34:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 20:34:10,600 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 20:34:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:10,600 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 20:34:10,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 20:34:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:10,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:10,601 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:10,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:34:10,816 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:10,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-02 20:34:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:10,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519793987] [2021-05-02 20:34:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:10,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:10,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680281097] [2021-05-02 20:34:10,828 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:10,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:34:10,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:10,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:34:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:10,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 20:34:10,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:10,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519793987] [2021-05-02 20:34:10,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:10,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680281097] [2021-05-02 20:34:10,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680281097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:10,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:10,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:34:10,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491004085] [2021-05-02 20:34:10,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:10,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:10,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:10,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:10,973 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:11,034 INFO L93 Difference]: Finished difference Result 340 states and 487 transitions. [2021-05-02 20:34:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 20:34:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:11,036 INFO L225 Difference]: With dead ends: 340 [2021-05-02 20:34:11,036 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 20:34:11,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 20:34:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 20:34:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 20:34:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 20:34:11,043 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 20:34:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:11,044 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 20:34:11,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 20:34:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:34:11,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:11,044 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:11,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:34:11,261 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-02 20:34:11,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:11,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825218073] [2021-05-02 20:34:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:11,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:11,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319659889] [2021-05-02 20:34:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:34:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:11,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:34:11,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:11,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825218073] [2021-05-02 20:34:11,515 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:11,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319659889] [2021-05-02 20:34:11,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319659889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:11,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:11,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:34:11,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883457215] [2021-05-02 20:34:11,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:34:11,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:34:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:11,518 INFO L87 Difference]: Start difference. First operand 333 states and 480 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:34:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:11,832 INFO L93 Difference]: Finished difference Result 440 states and 639 transitions. [2021-05-02 20:34:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:11,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-02 20:34:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:11,835 INFO L225 Difference]: With dead ends: 440 [2021-05-02 20:34:11,835 INFO L226 Difference]: Without dead ends: 440 [2021-05-02 20:34:11,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:34:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-02 20:34:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 351. [2021-05-02 20:34:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 196 states have (on average 1.2040816326530612) internal successors, (236), 201 states have internal predecessors, (236), 135 states have call successors, (135), 20 states have call predecessors, (135), 19 states have return successors, (133), 129 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 20:34:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 504 transitions. [2021-05-02 20:34:11,847 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 504 transitions. Word has length 79 [2021-05-02 20:34:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:11,847 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 504 transitions. [2021-05-02 20:34:11,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:34:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 504 transitions. [2021-05-02 20:34:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:11,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:11,848 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:12,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:34:12,063 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-02 20:34:12,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:12,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254580818] [2021-05-02 20:34:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:12,068 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:12,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407049171] [2021-05-02 20:34:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:34:12,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 20:34:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:12,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254580818] [2021-05-02 20:34:12,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:12,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407049171] [2021-05-02 20:34:12,731 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:34:12,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,947 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1578) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1391) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1321) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1310) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SubstitutionWithLocalSimplification.convertApplicationTerm(SubstitutionWithLocalSimplification.java:49) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:386) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:34:12,951 INFO L168 Benchmark]: Toolchain (without parser) took 14975.69 ms. Allocated memory was 175.1 MB in the beginning and 313.5 MB in the end (delta: 138.4 MB). Free memory was 139.9 MB in the beginning and 157.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 122.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:12,952 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 175.1 MB. Free memory was 156.7 MB in the beginning and 156.6 MB in the end (delta: 102.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:34:12,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.58 ms. Allocated memory is still 175.1 MB. Free memory was 139.8 MB in the beginning and 129.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:12,952 INFO L168 Benchmark]: Boogie Preprocessor took 74.63 ms. Allocated memory is still 175.1 MB. Free memory was 129.7 MB in the beginning and 159.4 MB in the end (delta: -29.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:12,952 INFO L168 Benchmark]: RCFGBuilder took 230.18 ms. Allocated memory is still 175.1 MB. Free memory was 159.4 MB in the beginning and 141.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:12,952 INFO L168 Benchmark]: IcfgTransformer took 21.27 ms. Allocated memory is still 175.1 MB. Free memory was 141.5 MB in the beginning and 140.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:12,952 INFO L168 Benchmark]: TraceAbstraction took 14491.24 ms. Allocated memory was 175.1 MB in the beginning and 313.5 MB in the end (delta: 138.4 MB). Free memory was 139.5 MB in the beginning and 157.3 MB in the end (delta: -17.8 MB). Peak memory consumption was 122.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:12,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 175.1 MB. Free memory was 156.7 MB in the beginning and 156.6 MB in the end (delta: 102.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 151.58 ms. Allocated memory is still 175.1 MB. Free memory was 139.8 MB in the beginning and 129.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.63 ms. Allocated memory is still 175.1 MB. Free memory was 129.7 MB in the beginning and 159.4 MB in the end (delta: -29.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 230.18 ms. Allocated memory is still 175.1 MB. Free memory was 159.4 MB in the beginning and 141.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 21.27 ms. Allocated memory is still 175.1 MB. Free memory was 141.5 MB in the beginning and 140.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14491.24 ms. Allocated memory was 175.1 MB in the beginning and 313.5 MB in the end (delta: 138.4 MB). Free memory was 139.5 MB in the beginning and 157.3 MB in the end (delta: -17.8 MB). Peak memory consumption was 122.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...