/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_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:32,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:32,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:32,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 20:33:32,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:32,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:32,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:32,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:32,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:32,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:32,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:32,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:32,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:32,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:32,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:32,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:32,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:32,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:32,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:32,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:32,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:32,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:32,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:32,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:32,140 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:32,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:32,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:32,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:32,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:32,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:32,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:32,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:32,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:32,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:32,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:32,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:32,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:32,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:32,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:32,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:32,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:32,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:32,145 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:32,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:32,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:32,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:32,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:32,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:32,487 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:32,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-02 20:33:32,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed99008b3/4ac0faf4362a446088ffefb55d44db25/FLAGdc1bb0008 [2021-05-02 20:33:32,972 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:32,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-02 20:33:32,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed99008b3/4ac0faf4362a446088ffefb55d44db25/FLAGdc1bb0008 [2021-05-02 20:33:33,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed99008b3/4ac0faf4362a446088ffefb55d44db25 [2021-05-02 20:33:33,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:33,365 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:33,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:33,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:33,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:33,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb0f522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33, skipping insertion in model container [2021-05-02 20:33:33,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:33,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:33,526 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_valuebound1.c[490,503] [2021-05-02 20:33:33,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:33,567 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:33,621 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_valuebound1.c[490,503] [2021-05-02 20:33:33,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:33,650 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:33,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33 WrapperNode [2021-05-02 20:33:33,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:33,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:33,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:33,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:33,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... [2021-05-02 20:33:33,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:33,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:33,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:33,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:33,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:33,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:33,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:33,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:33,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:33,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:33,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:33,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:33,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:34,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:34,046 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:34,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:34 BoogieIcfgContainer [2021-05-02 20:33:34,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:34,048 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:34,048 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:34,049 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:34,051 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:34" (1/1) ... [2021-05-02 20:33:34,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:34 BasicIcfg [2021-05-02 20:33:34,074 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:34,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:34,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:34,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:34,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:33" (1/4) ... [2021-05-02 20:33:34,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3134e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:34, skipping insertion in model container [2021-05-02 20:33:34,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:33" (2/4) ... [2021-05-02 20:33:34,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3134e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:34, skipping insertion in model container [2021-05-02 20:33:34,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:34" (3/4) ... [2021-05-02 20:33:34,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3134e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:34, skipping insertion in model container [2021-05-02 20:33:34,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:34" (4/4) ... [2021-05-02 20:33:34,081 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.cJordan [2021-05-02 20:33:34,085 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:34,089 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:34,104 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:34,119 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:34,120 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:34,120 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:34,120 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:34,120 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:34,120 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:34,120 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:34,120 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:34,135 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 20:33:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:33:34,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:34,151 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 20:33:34,158 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:34,169 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-02 20:33:34,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:34,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650967449] [2021-05-02 20:33:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:33:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:33:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:33:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,522 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 20:33:34,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:34,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650967449] [2021-05-02 20:33:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650967449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:34,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:34,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:34,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603809190] [2021-05-02 20:33:34,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:34,545 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 20:33:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:34,707 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 20:33:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:34,709 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 20:33:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:34,715 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:34,715 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:33:34,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:33:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:33:34,750 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 20:33:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 20:33:34,753 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 20:33:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:34,753 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 20:33:34,753 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 20:33:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 20:33:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:33:34,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:34,755 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 20:33:34,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:34,755 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-02 20:33:34,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:34,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398677446] [2021-05-02 20:33:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:34,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:34,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689110511] [2021-05-02 20:33:34,775 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 20:33:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:34,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:34,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,992 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 20:33:34,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398677446] [2021-05-02 20:33:34,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689110511] [2021-05-02 20:33:34,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689110511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:34,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:34,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:34,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566427016] [2021-05-02 20:33:34,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:34,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:34,996 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 20:33:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:35,076 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 20:33:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:35,076 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 20:33:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:35,078 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:33:35,078 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:33:35,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:33:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 20:33:35,085 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 20:33:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:33:35,086 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 20:33:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:35,086 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:33:35,086 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 20:33:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:33:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:33:35,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:35,088 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 20:33:35,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:35,306 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-02 20:33:35,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:35,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514608036] [2021-05-02 20:33:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:35,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:35,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341226953] [2021-05-02 20:33:35,328 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 20:33:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:35,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,790 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 20:33:35,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:35,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514608036] [2021-05-02 20:33:35,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:35,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341226953] [2021-05-02 20:33:35,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341226953] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:35,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:35,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:33:35,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857143149] [2021-05-02 20:33:35,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:35,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:35,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:35,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:35,795 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:33:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:35,936 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 20:33:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 20:33:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:35,942 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:33:35,942 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:33:35,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:33:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:33:35,958 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 20:33:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 20:33:35,963 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 20:33:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:35,964 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 20:33:35,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:33:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 20:33:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:33:35,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:35,966 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 20:33:36,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:36,179 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-02 20:33:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:36,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134994390] [2021-05-02 20:33:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:36,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:36,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44054119] [2021-05-02 20:33:36,194 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 20:33:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:33:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,437 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 20:33:36,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134994390] [2021-05-02 20:33:36,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44054119] [2021-05-02 20:33:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44054119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:36,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058536566] [2021-05-02 20:33:36,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:36,439 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 20:33:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:36,605 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2021-05-02 20:33:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:33:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 39 [2021-05-02 20:33:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:36,608 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:33:36,608 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:33:36,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:33:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2021-05-02 20:33:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 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 20:33:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-05-02 20:33:36,634 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 39 [2021-05-02 20:33:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:36,635 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-05-02 20:33:36,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 20:33:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-05-02 20:33:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:36,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:36,636 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 20:33:36,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:36,854 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:36,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-02 20:33:36,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:36,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545267610] [2021-05-02 20:33:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:36,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:36,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512659174] [2021-05-02 20:33:36,867 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 20:33:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:36,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:33:37,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:37,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545267610] [2021-05-02 20:33:37,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:37,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512659174] [2021-05-02 20:33:37,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512659174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:37,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:37,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:33:37,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469570668] [2021-05-02 20:33:37,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:37,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:37,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:37,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:37,140 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:33:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:37,255 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-05-02 20:33:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2021-05-02 20:33:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:37,256 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:33:37,256 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:33:37,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:33:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-02 20:33:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:33:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-05-02 20:33:37,261 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2021-05-02 20:33:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:37,262 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-05-02 20:33:37,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:33:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-05-02 20:33:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:37,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:37,263 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 20:33:37,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:37,469 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-02 20:33:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140075224] [2021-05-02 20:33:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:37,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:37,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534508385] [2021-05-02 20:33:37,485 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 20:33:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:37,700 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 20:33:37,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:37,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140075224] [2021-05-02 20:33:37,701 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:37,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534508385] [2021-05-02 20:33:37,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534508385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:37,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:37,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:37,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656849891] [2021-05-02 20:33:37,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:37,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:37,703 INFO L87 Difference]: Start difference. First operand 56 states and 69 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 20:33:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:37,860 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-02 20:33:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:37,860 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 20:33:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:37,861 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:33:37,861 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:33:37,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:33:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 20:33:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:33:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-05-02 20:33:37,867 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 47 [2021-05-02 20:33:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:37,867 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-05-02 20:33:37,867 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 20:33:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-05-02 20:33:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:33:37,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:37,868 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 20:33:38,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:33:38,086 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-02 20:33:38,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:38,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41120371] [2021-05-02 20:33:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:38,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:38,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127384332] [2021-05-02 20:33:38,094 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 20:33:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:33:38,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:38,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:33:38,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:38,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41120371] [2021-05-02 20:33:38,332 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:38,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127384332] [2021-05-02 20:33:38,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127384332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:38,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:38,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:38,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078976954] [2021-05-02 20:33:38,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:38,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:38,333 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:33:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:38,495 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2021-05-02 20:33:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-02 20:33:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:38,496 INFO L225 Difference]: With dead ends: 87 [2021-05-02 20:33:38,497 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 20:33:38,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 20:33:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2021-05-02 20:33:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:33:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2021-05-02 20:33:38,503 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 52 [2021-05-02 20:33:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:38,504 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2021-05-02 20:33:38,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:33:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2021-05-02 20:33:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:33:38,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:38,505 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 20:33:38,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:38,721 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-02 20:33:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:38,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206785398] [2021-05-02 20:33:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:38,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:38,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213508927] [2021-05-02 20:33:38,734 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 20:33:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 20:33:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:38,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:33:39,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206785398] [2021-05-02 20:33:39,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213508927] [2021-05-02 20:33:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213508927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:39,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:33:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276906847] [2021-05-02 20:33:39,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:33:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:33:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:39,373 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:33:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:39,885 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2021-05-02 20:33:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:33:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2021-05-02 20:33:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:39,889 INFO L225 Difference]: With dead ends: 98 [2021-05-02 20:33:39,889 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 20:33:39,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-05-02 20:33:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 20:33:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-05-02 20:33:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:33:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-05-02 20:33:39,908 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 64 [2021-05-02 20:33:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:39,908 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-05-02 20:33:39,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:33:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-05-02 20:33:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:33:39,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:39,912 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 20:33:40,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:40,131 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:40,131 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-02 20:33:40,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:40,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237512783] [2021-05-02 20:33:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:40,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:40,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790815435] [2021-05-02 20:33:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:40,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 20:33:40,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237512783] [2021-05-02 20:33:40,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790815435] [2021-05-02 20:33:40,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790815435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:40,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:40,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:40,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208105399] [2021-05-02 20:33:40,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:40,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:40,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:40,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:40,453 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:33:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:40,548 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 20:33:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 20:33:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:40,549 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:33:40,549 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:33:40,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:33:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:33:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:33:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:33:40,550 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-05-02 20:33:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:40,550 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:33:40,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:33:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:33:40,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:33:40,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:33:40,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:40 BasicIcfg [2021-05-02 20:33:40,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:33:40,769 INFO L168 Benchmark]: Toolchain (without parser) took 7404.07 ms. Allocated memory was 183.5 MB in the beginning and 280.0 MB in the end (delta: 96.5 MB). Free memory was 149.6 MB in the beginning and 132.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 115.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:40,769 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 166.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:33:40,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.23 ms. Allocated memory is still 183.5 MB. Free memory was 149.5 MB in the beginning and 166.8 MB in the end (delta: -17.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:40,769 INFO L168 Benchmark]: Boogie Preprocessor took 43.01 ms. Allocated memory is still 183.5 MB. Free memory was 166.8 MB in the beginning and 165.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:40,769 INFO L168 Benchmark]: RCFGBuilder took 345.68 ms. Allocated memory is still 183.5 MB. Free memory was 165.3 MB in the beginning and 148.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:40,769 INFO L168 Benchmark]: IcfgTransformer took 26.72 ms. Allocated memory is still 183.5 MB. Free memory was 148.0 MB in the beginning and 146.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:40,769 INFO L168 Benchmark]: TraceAbstraction took 6692.56 ms. Allocated memory was 183.5 MB in the beginning and 280.0 MB in the end (delta: 96.5 MB). Free memory was 146.4 MB in the beginning and 132.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:40,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 166.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.23 ms. Allocated memory is still 183.5 MB. Free memory was 149.5 MB in the beginning and 166.8 MB in the end (delta: -17.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.01 ms. Allocated memory is still 183.5 MB. Free memory was 166.8 MB in the beginning and 165.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 345.68 ms. Allocated memory is still 183.5 MB. Free memory was 165.3 MB in the beginning and 148.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 26.72 ms. Allocated memory is still 183.5 MB. Free memory was 148.0 MB in the beginning and 146.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6692.56 ms. Allocated memory was 183.5 MB in the beginning and 280.0 MB in the end (delta: 96.5 MB). Free memory was 146.4 MB in the beginning and 132.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6647.6ms, OverallIterations: 9, TraceHistogramMax: 8, EmptinessCheckTime: 32.0ms, AutomataDifference: 1643.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 322 SDtfs, 511 SDslu, 1303 SDs, 0 SdLazy, 1001 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 857.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 425 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1196.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=8, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 31 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 115.0ms SsaConstructionTime, 244.1ms SatisfiabilityAnalysisTime, 2263.4ms InterpolantComputationTime, 422 NumberOfCodeBlocks, 422 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 413 ConstructedInterpolants, 0 QuantifiedInterpolants, 1963 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1393 ConjunctsInSsa, 218 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 341/385 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...